I have an image that I want to break up into regions and calculate the Standard deviation of (using STD2). I only want the result to contain calculations for COMPLETE blocks. Walter has kindly suggested to use "PadMethod"as NaN, then the resulting data would have NaNs in the partial columns / rows that I can then process out.

However, using PadPartialBlocks doesn’t seem to be working as it should
bss = [500,500];
fh = @(bs) std2(bs.data);
J = blockproc(IM2, bss, fh,’UseParallel’,true,’PadPartialBlocks’,true,’PadMethod’,NaN);

The last column (=col 21) which is the "partial" column doesn’t have values I was expecting. Surely they should all be NaN? Its as though the NaN isn’t actally been replaced in the last partial column – what am I doing wrong?I have an image that I want to break up into regions and calculate the Standard deviation of (using STD2). I only want the result to contain calculations for COMPLETE blocks. Walter has kindly suggested to use "PadMethod"as NaN, then the resulting data would have NaNs in the partial columns / rows that I can then process out.

However, using PadPartialBlocks doesn’t seem to be working as it should
bss = [500,500];
fh = @(bs) std2(bs.data);
J = blockproc(IM2, bss, fh,’UseParallel’,true,’PadPartialBlocks’,true,’PadMethod’,NaN);

The last column (=col 21) which is the "partial" column doesn’t have values I was expecting. Surely they should all be NaN? Its as though the NaN isn’t actally been replaced in the last partial column – what am I doing wrong? I have an image that I want to break up into regions and calculate the Standard deviation of (using STD2). I only want the result to contain calculations for COMPLETE blocks. Walter has kindly suggested to use "PadMethod"as NaN, then the resulting data would have NaNs in the partial columns / rows that I can then process out.

However, using PadPartialBlocks doesn’t seem to be working as it should
bss = [500,500];
fh = @(bs) std2(bs.data);
J = blockproc(IM2, bss, fh,’UseParallel’,true,’PadPartialBlocks’,true,’PadMethod’,NaN);

The last column (=col 21) which is the "partial" column doesn’t have values I was expecting. Surely they should all be NaN? Its as though the NaN isn’t actally been replaced in the last partial column – what am I doing wrong? blockproc, padpartialblocks, nan MATLAB Answers — New Questions

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I would like to know what redundant servers are, and how to generate and install a redundant server license file for MATLAB and associated products.I would like to know what redundant servers are, and how to generate and install a redundant server license file for MATLAB and associated products. I would like to know what redundant servers are, and how to generate and install a redundant server license file for MATLAB and associated products.  MATLAB Answers — New Questions

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Dear MathWorks Support Team,
I am reporting a cross-platform internal error in MATLAB R2025b involving the interaction between the Search Path and Dropbox. This issue has been consistently reproduced on both Windows 11 and macOS (Sequoia).
The error occurs whenever a Dropbox-synced folder is added to the MATLAB Search Path. After running any script from that path, MATLAB throws a std::exception: "Unexpected mxArray type returned from feval. Expected class std::basic_string… but found string." originating from internal.matlab.datatoolsservices.WSBUtil.getWorkspaceDisplay.
I have already performed the following troubleshooting steps to isolate the issue:
Clean Reinstallation: Performed a complete uninstall and deleted all MathWorks-related metadata folders, including %AppData%MathWorks, %LocalAppData%MathWorks, and the MATLAB folder in Documents.
Configuration Reset: Reset the userpath and cleared all pathdef.m files to ensure no legacy settings from previous versions (like R2024b) were interfering.
Cross-Platform Testing: Confirmed the exact same behavior on a newly purchased MacBook and a Windows PC.
Path Isolation: Confirmed that the error only occurs when the Dropbox folder is added to the "Set Path" list. It does not occur if the directory is accessed only via the cd command.
GUI Minimization: Even after closing the Workspace and Current Folder browsers and disabling datatips, the internal WSBUtil error still triggers upon script completion.
It appears the R2025b engine incorrectly handles path metadata from cloud-synced file systems, passing a string object where internal C++ UI functions expect a char array. Given that my research workflow across multiple machines relies entirely on Dropbox, this bug is a significant hindrance.
I look forward to your technical analysis and a potential patch for this engine bug.
Best regards,Dear MathWorks Support Team,
I am reporting a cross-platform internal error in MATLAB R2025b involving the interaction between the Search Path and Dropbox. This issue has been consistently reproduced on both Windows 11 and macOS (Sequoia).
The error occurs whenever a Dropbox-synced folder is added to the MATLAB Search Path. After running any script from that path, MATLAB throws a std::exception: "Unexpected mxArray type returned from feval. Expected class std::basic_string… but found string." originating from internal.matlab.datatoolsservices.WSBUtil.getWorkspaceDisplay.
I have already performed the following troubleshooting steps to isolate the issue:
Clean Reinstallation: Performed a complete uninstall and deleted all MathWorks-related metadata folders, including %AppData%MathWorks, %LocalAppData%MathWorks, and the MATLAB folder in Documents.
Configuration Reset: Reset the userpath and cleared all pathdef.m files to ensure no legacy settings from previous versions (like R2024b) were interfering.
Cross-Platform Testing: Confirmed the exact same behavior on a newly purchased MacBook and a Windows PC.
Path Isolation: Confirmed that the error only occurs when the Dropbox folder is added to the "Set Path" list. It does not occur if the directory is accessed only via the cd command.
GUI Minimization: Even after closing the Workspace and Current Folder browsers and disabling datatips, the internal WSBUtil error still triggers upon script completion.
It appears the R2025b engine incorrectly handles path metadata from cloud-synced file systems, passing a string object where internal C++ UI functions expect a char array. Given that my research workflow across multiple machines relies entirely on Dropbox, this bug is a significant hindrance.
I look forward to your technical analysis and a potential patch for this engine bug.
Best regards, Dear MathWorks Support Team,
I am reporting a cross-platform internal error in MATLAB R2025b involving the interaction between the Search Path and Dropbox. This issue has been consistently reproduced on both Windows 11 and macOS (Sequoia).
The error occurs whenever a Dropbox-synced folder is added to the MATLAB Search Path. After running any script from that path, MATLAB throws a std::exception: "Unexpected mxArray type returned from feval. Expected class std::basic_string… but found string." originating from internal.matlab.datatoolsservices.WSBUtil.getWorkspaceDisplay.
I have already performed the following troubleshooting steps to isolate the issue:
Clean Reinstallation: Performed a complete uninstall and deleted all MathWorks-related metadata folders, including %AppData%MathWorks, %LocalAppData%MathWorks, and the MATLAB folder in Documents.
Configuration Reset: Reset the userpath and cleared all pathdef.m files to ensure no legacy settings from previous versions (like R2024b) were interfering.
Cross-Platform Testing: Confirmed the exact same behavior on a newly purchased MacBook and a Windows PC.
Path Isolation: Confirmed that the error only occurs when the Dropbox folder is added to the "Set Path" list. It does not occur if the directory is accessed only via the cd command.
GUI Minimization: Even after closing the Workspace and Current Folder browsers and disabling datatips, the internal WSBUtil error still triggers upon script completion.
It appears the R2025b engine incorrectly handles path metadata from cloud-synced file systems, passing a string object where internal C++ UI functions expect a char array. Given that my research workflow across multiple machines relies entirely on Dropbox, this bug is a significant hindrance.
I look forward to your technical analysis and a potential patch for this engine bug.
Best regards, r2025b internal engine bug, std::exception, unexpe, dropbox integration, search path conflict, cloud-s MATLAB Answers — New Questions

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How can I get and set the properties of a Figure Container introduced in MATLAB 2025?
For example, I want to change the window state of a Figure Container (not the figure window state) to “Maximized” from a script.How can I get and set the properties of a Figure Container introduced in MATLAB 2025?
For example, I want to change the window state of a Figure Container (not the figure window state) to “Maximized” from a script. How can I get and set the properties of a Figure Container introduced in MATLAB 2025?
For example, I want to change the window state of a Figure Container (not the figure window state) to “Maximized” from a script. figure container, properties MATLAB Answers — New Questions

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I have been working on a post processing software for a few months for a robotics system my company makes. It does a lot of different things and is now being rolled out to our customers for use, which is exciting for me. My company makes a few different types of robots, one of them is very different than the others. To give a bit of context before getting to my question:
One of our robots does hull cleaning and inspection autonomously. When the vehicle is attached to a hull, the coordinate system is now relative to the ship, meaning the heading of the vehicle is relative to the Bow where 0 degrees is pointing towards the bow, 180 is pointed stern. "Latitude" is relative to the bottom where 0 degrees is at the keel and 90 degrees is at the waterline. "Longitude" is the distance from the centerline of the ship, where 180 is at the bow, and -180 is at the stern. Its a weird system but it doesnt matter where we are in the world, it only matters where we are on the ship.
Im trying to improve my app to work with this other robotics system, for all of our other robots we use a regular coordinate system with regular lat and long. When the user plots the data it does so over a satellite basemap, it looks great. When a user of our hull cleaning robot plots the data we typically do it over a 2D "folded out" image of the ship. Right now we have to do this by hand and its time consuming. The customer, who ever is hiring us to clean their ship, will provide us with an engineering drawing of the vessel, but there is a lot of stuff in the document we dont want to be included in the final product. Usually our operators use MS Paint or Adobe Illustrator to remove all the extra stuff, and they are left with a profile of the port, starboard, and top down veiw of the vessel, then we put it in QGIS and plot the points on top. Following this we take a screenshot and edit everything for a final product. Its time consuming and exhausting.
So heres my question. How can I get matlab to remove all the extra stuff for me? The two images I attached is what the engineering drawings typically look like vs what we use for our final product. I have the imaging processing toolbox and im trying to find a way to remove the extra stuff. the problem is its always a little different, sometimes the ships are much bigger than others. Any help or advice would be very much appreciated!I have been working on a post processing software for a few months for a robotics system my company makes. It does a lot of different things and is now being rolled out to our customers for use, which is exciting for me. My company makes a few different types of robots, one of them is very different than the others. To give a bit of context before getting to my question:
One of our robots does hull cleaning and inspection autonomously. When the vehicle is attached to a hull, the coordinate system is now relative to the ship, meaning the heading of the vehicle is relative to the Bow where 0 degrees is pointing towards the bow, 180 is pointed stern. "Latitude" is relative to the bottom where 0 degrees is at the keel and 90 degrees is at the waterline. "Longitude" is the distance from the centerline of the ship, where 180 is at the bow, and -180 is at the stern. Its a weird system but it doesnt matter where we are in the world, it only matters where we are on the ship.
Im trying to improve my app to work with this other robotics system, for all of our other robots we use a regular coordinate system with regular lat and long. When the user plots the data it does so over a satellite basemap, it looks great. When a user of our hull cleaning robot plots the data we typically do it over a 2D "folded out" image of the ship. Right now we have to do this by hand and its time consuming. The customer, who ever is hiring us to clean their ship, will provide us with an engineering drawing of the vessel, but there is a lot of stuff in the document we dont want to be included in the final product. Usually our operators use MS Paint or Adobe Illustrator to remove all the extra stuff, and they are left with a profile of the port, starboard, and top down veiw of the vessel, then we put it in QGIS and plot the points on top. Following this we take a screenshot and edit everything for a final product. Its time consuming and exhausting.
So heres my question. How can I get matlab to remove all the extra stuff for me? The two images I attached is what the engineering drawings typically look like vs what we use for our final product. I have the imaging processing toolbox and im trying to find a way to remove the extra stuff. the problem is its always a little different, sometimes the ships are much bigger than others. Any help or advice would be very much appreciated! I have been working on a post processing software for a few months for a robotics system my company makes. It does a lot of different things and is now being rolled out to our customers for use, which is exciting for me. My company makes a few different types of robots, one of them is very different than the others. To give a bit of context before getting to my question:
One of our robots does hull cleaning and inspection autonomously. When the vehicle is attached to a hull, the coordinate system is now relative to the ship, meaning the heading of the vehicle is relative to the Bow where 0 degrees is pointing towards the bow, 180 is pointed stern. "Latitude" is relative to the bottom where 0 degrees is at the keel and 90 degrees is at the waterline. "Longitude" is the distance from the centerline of the ship, where 180 is at the bow, and -180 is at the stern. Its a weird system but it doesnt matter where we are in the world, it only matters where we are on the ship.
Im trying to improve my app to work with this other robotics system, for all of our other robots we use a regular coordinate system with regular lat and long. When the user plots the data it does so over a satellite basemap, it looks great. When a user of our hull cleaning robot plots the data we typically do it over a 2D "folded out" image of the ship. Right now we have to do this by hand and its time consuming. The customer, who ever is hiring us to clean their ship, will provide us with an engineering drawing of the vessel, but there is a lot of stuff in the document we dont want to be included in the final product. Usually our operators use MS Paint or Adobe Illustrator to remove all the extra stuff, and they are left with a profile of the port, starboard, and top down veiw of the vessel, then we put it in QGIS and plot the points on top. Following this we take a screenshot and edit everything for a final product. Its time consuming and exhausting.
So heres my question. How can I get matlab to remove all the extra stuff for me? The two images I attached is what the engineering drawings typically look like vs what we use for our final product. I have the imaging processing toolbox and im trying to find a way to remove the extra stuff. the problem is its always a little different, sometimes the ships are much bigger than others. Any help or advice would be very much appreciated! image processing MATLAB Answers — New Questions

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One thing that I would like to do is cut and paste a table to an email. When I do this however, particularly if a paste more than one table into the same email, the formatting doesn’t work. Particularly, the tables will be indented, but the second table will be indented from where the first table is indented, not from the start of the line.
I could paste as text only, but it would be nice to keep the formatting.
I could write to an excel sheet and then paste from there, but i don’t know how to keep the formatting doing that.
I asked copilot, but it doesn’t know how to help format a document.One thing that I would like to do is cut and paste a table to an email. When I do this however, particularly if a paste more than one table into the same email, the formatting doesn’t work. Particularly, the tables will be indented, but the second table will be indented from where the first table is indented, not from the start of the line.
I could paste as text only, but it would be nice to keep the formatting.
I could write to an excel sheet and then paste from there, but i don’t know how to keep the formatting doing that.
I asked copilot, but it doesn’t know how to help format a document. One thing that I would like to do is cut and paste a table to an email. When I do this however, particularly if a paste more than one table into the same email, the formatting doesn’t work. Particularly, the tables will be indented, but the second table will be indented from where the first table is indented, not from the start of the line.
I could paste as text only, but it would be nice to keep the formatting.
I could write to an excel sheet and then paste from there, but i don’t know how to keep the formatting doing that.
I asked copilot, but it doesn’t know how to help format a document. cut and paste, outlook, office, format, indent MATLAB Answers — New Questions

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Why do I receive a connection error when accessing Add-Ons Explorer or the Software Support Installer?Why do I receive a connection error when accessing Add-Ons Explorer or the Software Support Installer? Why do I receive a connection error when accessing Add-Ons Explorer or the Software Support Installer?  MATLAB Answers — New Questions

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Hello,
I am just wondering why when plotting a timetable with duration as time axis, The "basic fitting" and "data statistics" tool in plot windos are not available.

Does this mean that timetables have some limitations compared to arrays or tables? I am asking because I need to decide if timetable is the right data structure for my use case. Basically I am importing some measuremet datas from sensors acquisition which have timestamps. In the past I would have just used plain arrays, but I see that in modern Matlab timetables are somehow suggested for these use cases.Hello,
I am just wondering why when plotting a timetable with duration as time axis, The "basic fitting" and "data statistics" tool in plot windos are not available.

Does this mean that timetables have some limitations compared to arrays or tables? I am asking because I need to decide if timetable is the right data structure for my use case. Basically I am importing some measuremet datas from sensors acquisition which have timestamps. In the past I would have just used plain arrays, but I see that in modern Matlab timetables are somehow suggested for these use cases. Hello,
I am just wondering why when plotting a timetable with duration as time axis, The "basic fitting" and "data statistics" tool in plot windos are not available.

Does this mean that timetables have some limitations compared to arrays or tables? I am asking because I need to decide if timetable is the right data structure for my use case. Basically I am importing some measuremet datas from sensors acquisition which have timestamps. In the past I would have just used plain arrays, but I see that in modern Matlab timetables are somehow suggested for these use cases. time series, data import MATLAB Answers — New Questions

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How can I set an expiration (override) date for my license file? Can this date be different from the expiration date of the license itself?How can I set an expiration (override) date for my license file? Can this date be different from the expiration date of the license itself? How can I set an expiration (override) date for my license file? Can this date be different from the expiration date of the license itself?  MATLAB Answers — New Questions

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In MATLAB, when an operation is manually terminated by the user via actions like Ctrl+C, the command line will print a prompt message that includes the relevant line number in legacy versions (e.g., R2016); however, this line number is omitted from the prompt in newer releases such as R2022.
function custom_interrupt_info()
disp(‘程序启动，按下Ctrl+C可中止并显示详细行号…’);
iteration_num = 100000; % 模拟耗时迭代

try
% #################### 你的核心业务代码 ####################
for i = 1:iteration_num
disp([‘当前执行第 ‘, num2str(i), ‘ 次迭代’]);
pause(0.03); % 模拟耗时操作，方便触发Ctrl+C
temp_result = i * 2; % 示例计算逻辑
end
% ##########################################################
finally
% 关键：无论是否中止，都获取并输出完整中止信息（含行号）
disp(‘=====================================================’);
disp(‘==================== 中止详细信息 ====================’);
stack_info = dbstack; % 提取堆栈信息（核心：获取行号）

if ~isempty(stack_info)
% 输出自定义详细信息，包含行号、文件、函数
disp([‘✅ 中止文件：’, stack_info(1).file]);
disp([‘✅ 中止行号：’, num2str(stack_info(1).line)]);
disp([‘✅ 所在脚本/函数：’, stack_info(1).name]);
else
disp(‘✅ 程序正常结束，无中止操作’);
end
disp(‘=====================================================’);
end
endIn MATLAB, when an operation is manually terminated by the user via actions like Ctrl+C, the command line will print a prompt message that includes the relevant line number in legacy versions (e.g., R2016); however, this line number is omitted from the prompt in newer releases such as R2022.
function custom_interrupt_info()
disp(‘程序启动，按下Ctrl+C可中止并显示详细行号…’);
iteration_num = 100000; % 模拟耗时迭代

try
% #################### 你的核心业务代码 ####################
for i = 1:iteration_num
disp([‘当前执行第 ‘, num2str(i), ‘ 次迭代’]);
pause(0.03); % 模拟耗时操作，方便触发Ctrl+C
temp_result = i * 2; % 示例计算逻辑
end
% ##########################################################
finally
% 关键：无论是否中止，都获取并输出完整中止信息（含行号）
disp(‘=====================================================’);
disp(‘==================== 中止详细信息 ====================’);
stack_info = dbstack; % 提取堆栈信息（核心：获取行号）

if ~isempty(stack_info)
% 输出自定义详细信息，包含行号、文件、函数
disp([‘✅ 中止文件：’, stack_info(1).file]);
disp([‘✅ 中止行号：’, num2str(stack_info(1).line)]);
disp([‘✅ 所在脚本/函数：’, stack_info(1).name]);
else
disp(‘✅ 程序正常结束，无中止操作’);
end
disp(‘=====================================================’);
end
end In MATLAB, when an operation is manually terminated by the user via actions like Ctrl+C, the command line will print a prompt message that includes the relevant line number in legacy versions (e.g., R2016); however, this line number is omitted from the prompt in newer releases such as R2022.
function custom_interrupt_info()
disp(‘程序启动，按下Ctrl+C可中止并显示详细行号…’);
iteration_num = 100000; % 模拟耗时迭代

try
% #################### 你的核心业务代码 ####################
for i = 1:iteration_num
disp([‘当前执行第 ‘, num2str(i), ‘ 次迭代’]);
pause(0.03); % 模拟耗时操作，方便触发Ctrl+C
temp_result = i * 2; % 示例计算逻辑
end
% ##########################################################
finally
% 关键：无论是否中止，都获取并输出完整中止信息（含行号）
disp(‘=====================================================’);
disp(‘==================== 中止详细信息 ====================’);
stack_info = dbstack; % 提取堆栈信息（核心：获取行号）

if ~isempty(stack_info)
% 输出自定义详细信息，包含行号、文件、函数
disp([‘✅ 中止文件：’, stack_info(1).file]);
disp([‘✅ 中止行号：’, num2str(stack_info(1).line)]);
disp([‘✅ 所在脚本/函数：’, stack_info(1).name]);
else
disp(‘✅ 程序正常结束，无中止操作’);
end
disp(‘=====================================================’);
end
end line number, prompt message ctrl+c MATLAB Answers — New Questions

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