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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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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I have a file containing the values of the position of the body’s center of pressure, calculated during the trial. I would like to plot the time elapsed (which has the format ‘0:0:0:064’) vs the position. When I open the file (.xlsx) with "readtable", it reads me all the values as "string" and not numbers. I tried to solve this with "str2double", and while this works for the position column, is useless for the time elapsed. When I change the extension (i.e. .csv orb .txt) it converts all the durations into NaNs, even though in the "Import Data" mask it is written at the top of the time elapsed column "duration". As a result, I cannot plot the time on the x-axis.
If I run this piece of code for example:
data = readtable("AdaptationTestProva.xlsx");
x = str2double(data.x_StaticVR_RawMediolateralAxis);
y = str2double(data.TimeElapsed);
plot(y,x)
I get an empty graph.
What can I do to get a standard graph with a usable elapsed time?
If this can be helpful, I’ll leave attached an example of the file.I have a file containing the values of the position of the body’s center of pressure, calculated during the trial. I would like to plot the time elapsed (which has the format ‘0:0:0:064’) vs the position. When I open the file (.xlsx) with "readtable", it reads me all the values as "string" and not numbers. I tried to solve this with "str2double", and while this works for the position column, is useless for the time elapsed. When I change the extension (i.e. .csv orb .txt) it converts all the durations into NaNs, even though in the "Import Data" mask it is written at the top of the time elapsed column "duration". As a result, I cannot plot the time on the x-axis.
If I run this piece of code for example:
data = readtable("AdaptationTestProva.xlsx");
x = str2double(data.x_StaticVR_RawMediolateralAxis);
y = str2double(data.TimeElapsed);
plot(y,x)
I get an empty graph.
What can I do to get a standard graph with a usable elapsed time?
If this can be helpful, I’ll leave attached an example of the file. I have a file containing the values of the position of the body’s center of pressure, calculated during the trial. I would like to plot the time elapsed (which has the format ‘0:0:0:064’) vs the position. When I open the file (.xlsx) with "readtable", it reads me all the values as "string" and not numbers. I tried to solve this with "str2double", and while this works for the position column, is useless for the time elapsed. When I change the extension (i.e. .csv orb .txt) it converts all the durations into NaNs, even though in the "Import Data" mask it is written at the top of the time elapsed column "duration". As a result, I cannot plot the time on the x-axis.
If I run this piece of code for example:
data = readtable("AdaptationTestProva.xlsx");
x = str2double(data.x_StaticVR_RawMediolateralAxis);
y = str2double(data.TimeElapsed);
plot(y,x)
I get an empty graph.
What can I do to get a standard graph with a usable elapsed time?
If this can be helpful, I’ll leave attached an example of the file. #duration, #plot, #conversion MATLAB Answers — New Questions

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How do I license my Docker container using a Campus-Wide or Startup Individual license?How do I license my Docker container using a Campus-Wide or Startup Individual license? How do I license my Docker container using a Campus-Wide or Startup Individual license?  MATLAB Answers — New Questions

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Is there any matlab documentation that can explain why multiplying empty arrays gives zero matrices?
Here is the sample
A=double.empty(5,0);
B=double.empty(0,5);
C=A*B
C =

0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0Is there any matlab documentation that can explain why multiplying empty arrays gives zero matrices?
Here is the sample
A=double.empty(5,0);
B=double.empty(0,5);
C=A*B
C =

0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0 Is there any matlab documentation that can explain why multiplying empty arrays gives zero matrices?
Here is the sample
A=double.empty(5,0);
B=double.empty(0,5);
C=A*B
C =

0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0 mtimes, empty, arithmetic operations, operators and elementary operations MATLAB Answers — New Questions

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I author a handful of Digital Signal Processing algorithms in System objects (they are very handy indeed). Recently after upgrading to R2025b from R2024a I’ve hit an annoying snag. Most of the state, etc. of a system object will be in private properties. In prior versions, I could set a breakpoint in the stepImpl for instance and if I clicked on "obj" (the standard internal name for my object handle inside methods), I could see in the variable editor the value of all the properties, not just the externally visible ones. Then, I could step through the algorithm and make sure everything was computing correctly. Now there’s no handy way to do this? I tried the class browser but that doesn’t readily show the values of the current instance of the class. Why was this critical feature broken?I author a handful of Digital Signal Processing algorithms in System objects (they are very handy indeed). Recently after upgrading to R2025b from R2024a I’ve hit an annoying snag. Most of the state, etc. of a system object will be in private properties. In prior versions, I could set a breakpoint in the stepImpl for instance and if I clicked on "obj" (the standard internal name for my object handle inside methods), I could see in the variable editor the value of all the properties, not just the externally visible ones. Then, I could step through the algorithm and make sure everything was computing correctly. Now there’s no handy way to do this? I tried the class browser but that doesn’t readily show the values of the current instance of the class. Why was this critical feature broken? I author a handful of Digital Signal Processing algorithms in System objects (they are very handy indeed). Recently after upgrading to R2025b from R2024a I’ve hit an annoying snag. Most of the state, etc. of a system object will be in private properties. In prior versions, I could set a breakpoint in the stepImpl for instance and if I clicked on "obj" (the standard internal name for my object handle inside methods), I could see in the variable editor the value of all the properties, not just the externally visible ones. Then, I could step through the algorithm and make sure everything was computing correctly. Now there’s no handy way to do this? I tried the class browser but that doesn’t readily show the values of the current instance of the class. Why was this critical feature broken? debug, system object MATLAB Answers — New Questions

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Hi,
Currently , I am working on an MBD system (Outer-tub dynamic assembly of Front Load washing machine, with two hanging linear springs and 3 friction dampers). I want to compute the linearized dynamic model to perform the Eigenvalue analysis. I am following a research paper by Prof. Bae (An Implementation method of linearized equations of motion for multibody systems with closed loops). I compared the computed stiffness matric with Recurdyn computed stiffness matrix. RecurDyn provided two different stiffness matrices (one for static analysis and another one for Eigenvalue analysis). My stiffness matrix (Python code as Prof Bae paper) is matching with the Recurdyn stiffness matrix computed for static analysis.
I want to know why are these two stiffness matrices of RecurDyn different, and How to compute them?Hi,
Currently , I am working on an MBD system (Outer-tub dynamic assembly of Front Load washing machine, with two hanging linear springs and 3 friction dampers). I want to compute the linearized dynamic model to perform the Eigenvalue analysis. I am following a research paper by Prof. Bae (An Implementation method of linearized equations of motion for multibody systems with closed loops). I compared the computed stiffness matric with Recurdyn computed stiffness matrix. RecurDyn provided two different stiffness matrices (one for static analysis and another one for Eigenvalue analysis). My stiffness matrix (Python code as Prof Bae paper) is matching with the Recurdyn stiffness matrix computed for static analysis.
I want to know why are these two stiffness matrices of RecurDyn different, and How to compute them? Hi,
Currently , I am working on an MBD system (Outer-tub dynamic assembly of Front Load washing machine, with two hanging linear springs and 3 friction dampers). I want to compute the linearized dynamic model to perform the Eigenvalue analysis. I am following a research paper by Prof. Bae (An Implementation method of linearized equations of motion for multibody systems with closed loops). I compared the computed stiffness matric with Recurdyn computed stiffness matrix. RecurDyn provided two different stiffness matrices (one for static analysis and another one for Eigenvalue analysis). My stiffness matrix (Python code as Prof Bae paper) is matching with the Recurdyn stiffness matrix computed for static analysis.
I want to know why are these two stiffness matrices of RecurDyn different, and How to compute them? linearized dynamic model, eigenvalue analysis, outer-tub dynamic assembly wit, washing machine, static equilibrium, linear and torsional springs MATLAB Answers — New Questions

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