eq1 = b5*L1^2 + (b9 + b7)*L1 + b6*L2^2 + b10*L2 + b8 = 0:
eq2 = b27*L1^4 – b32*L1^3 + b33*L1^2 – b34*L1 …
+ b28*L2^4 – b35*L2^3 + b36*L2^2 – b37*L2 …
+ (b39 – b38 + b30 – b29 – b31) = 0:

%Solve the system for L1 and L2
solutions = solve({eq1, eq2}, {L1, L2}):eq1 = b5*L1^2 + (b9 + b7)*L1 + b6*L2^2 + b10*L2 + b8 = 0:
eq2 = b27*L1^4 – b32*L1^3 + b33*L1^2 – b34*L1 …
+ b28*L2^4 – b35*L2^3 + b36*L2^2 – b37*L2 …
+ (b39 – b38 + b30 – b29 – b31) = 0:

%Solve the system for L1 and L2
solutions = solve({eq1, eq2}, {L1, L2}): eq1 = b5*L1^2 + (b9 + b7)*L1 + b6*L2^2 + b10*L2 + b8 = 0:
eq2 = b27*L1^4 – b32*L1^3 + b33*L1^2 – b34*L1 …
+ b28*L2^4 – b35*L2^3 + b36*L2^2 – b37*L2 …
+ (b39 – b38 + b30 – b29 – b31) = 0:

%Solve the system for L1 and L2
solutions = solve({eq1, eq2}, {L1, L2}): solve MATLAB Answers — New Questions

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hi…
as part of my final project i have created the geometry of the cross section of a dam, in matlab, using an isogeometric numerical method code….
i have been asked to use the control points of this geometry, to mesh it on gmsh software, so that to compare the 2 methods, by finding the nodal coordinates and the connective matrix from the gmsh…
i have never used a meshing software before and i am a bit unfamiliar with the concepts of nodal coordinates and connective matrix i am supposed to find….
i know this is a more gmsh and finite element related question, however i would appreciate any help from this blog….
thanks in advance!hi…
as part of my final project i have created the geometry of the cross section of a dam, in matlab, using an isogeometric numerical method code….
i have been asked to use the control points of this geometry, to mesh it on gmsh software, so that to compare the 2 methods, by finding the nodal coordinates and the connective matrix from the gmsh…
i have never used a meshing software before and i am a bit unfamiliar with the concepts of nodal coordinates and connective matrix i am supposed to find….
i know this is a more gmsh and finite element related question, however i would appreciate any help from this blog….
thanks in advance! hi…
as part of my final project i have created the geometry of the cross section of a dam, in matlab, using an isogeometric numerical method code….
i have been asked to use the control points of this geometry, to mesh it on gmsh software, so that to compare the 2 methods, by finding the nodal coordinates and the connective matrix from the gmsh…
i have never used a meshing software before and i am a bit unfamiliar with the concepts of nodal coordinates and connective matrix i am supposed to find….
i know this is a more gmsh and finite element related question, however i would appreciate any help from this blog….
thanks in advance! finite elements, meshing, comparing numerical methods MATLAB Answers — New Questions

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Does somebody know, how to simply and theoretically generate a mesh of quadrilaterals on a given surface?

The surface is in the x,y-plane and might also have curved borders.

I have searched on google and found like tons and tons of informations and also free software to take over this Job, but I really would like to know, how I can generate a mesh of quadrilateral elements which corresponds to a given surface just on my own.

So where is the best place to start? I need to develop my own understanding and also my own spaghetti code for this task.

Given the borders of and the interior of a 2D surface, how or where should I start in order to get my ‘new’ vertices on the interior of the surface? How do I know, how many quadrilateral elements and corresponding vertices do I need?

Thank you for your help and support in advance.

Regards

Ahmed HossamDoes somebody know, how to simply and theoretically generate a mesh of quadrilaterals on a given surface?

The surface is in the x,y-plane and might also have curved borders.

I have searched on google and found like tons and tons of informations and also free software to take over this Job, but I really would like to know, how I can generate a mesh of quadrilateral elements which corresponds to a given surface just on my own.

So where is the best place to start? I need to develop my own understanding and also my own spaghetti code for this task.

Given the borders of and the interior of a 2D surface, how or where should I start in order to get my ‘new’ vertices on the interior of the surface? How do I know, how many quadrilateral elements and corresponding vertices do I need?

Thank you for your help and support in advance.

Regards

Ahmed Hossam Does somebody know, how to simply and theoretically generate a mesh of quadrilaterals on a given surface?

The surface is in the x,y-plane and might also have curved borders.

I have searched on google and found like tons and tons of informations and also free software to take over this Job, but I really would like to know, how I can generate a mesh of quadrilateral elements which corresponds to a given surface just on my own.

So where is the best place to start? I need to develop my own understanding and also my own spaghetti code for this task.

Given the borders of and the interior of a 2D surface, how or where should I start in order to get my ‘new’ vertices on the interior of the surface? How do I know, how many quadrilateral elements and corresponding vertices do I need?

Thank you for your help and support in advance.

Regards

Ahmed Hossam finite elements, meshing, quadrilateral meshes, surface, 2d MATLAB Answers — New Questions

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Hello
I want to take an integral from the function that has a singularity(pole), by quadgk but this common don’t give a right answer .for instance an integral of the function 1/(x-1) from(-2,2)
anyone can guide me
thanksHello
I want to take an integral from the function that has a singularity(pole), by quadgk but this common don’t give a right answer .for instance an integral of the function 1/(x-1) from(-2,2)
anyone can guide me
thanks Hello
I want to take an integral from the function that has a singularity(pole), by quadgk but this common don’t give a right answer .for instance an integral of the function 1/(x-1) from(-2,2)
anyone can guide me
thanks quadgk-numerical integral-singularity MATLAB Answers — New Questions

​

Hi,
I am fairly new to matlab but used it years ago and have forgotten a lot.
I have downloaded an m file which should work but provides an error when encountering the following line of code.
u2=-J*u2.*q1; and there are two carrots underneath the "q1".
Can someone provide a suggestion as to how to interpret this error?
Thank You
TomHi,
I am fairly new to matlab but used it years ago and have forgotten a lot.
I have downloaded an m file which should work but provides an error when encountering the following line of code.
u2=-J*u2.*q1; and there are two carrots underneath the "q1".
Can someone provide a suggestion as to how to interpret this error?
Thank You
Tom Hi,
I am fairly new to matlab but used it years ago and have forgotten a lot.
I have downloaded an m file which should work but provides an error when encountering the following line of code.
u2=-J*u2.*q1; and there are two carrots underneath the "q1".
Can someone provide a suggestion as to how to interpret this error?
Thank You
Tom imaginary -j MATLAB Answers — New Questions

​

The execution time in MATLAB is much longer when executed from a network drive compared to a local directory. For example, "genpath" takes a few seconds from a local directory, but it takes several minutes from a network drive.
Why is MATLAB slow during startup and when performing specific operations, such as "genpath", after moving files to a network drive?The execution time in MATLAB is much longer when executed from a network drive compared to a local directory. For example, "genpath" takes a few seconds from a local directory, but it takes several minutes from a network drive.
Why is MATLAB slow during startup and when performing specific operations, such as "genpath", after moving files to a network drive? The execution time in MATLAB is much longer when executed from a network drive compared to a local directory. For example, "genpath" takes a few seconds from a local directory, but it takes several minutes from a network drive.
Why is MATLAB slow during startup and when performing specific operations, such as "genpath", after moving files to a network drive? slow, matalb, network, files MATLAB Answers — New Questions

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Iam using Debian. I just installed matlab 2026a. It seemed that everything was fine during installation.
When I try to start matlab, I see a flu window. In front of that window I see a blue small page writing MATLAB. It does not go away and I cannot use matlab. How can I solve this?Iam using Debian. I just installed matlab 2026a. It seemed that everything was fine during installation.
When I try to start matlab, I see a flu window. In front of that window I see a blue small page writing MATLAB. It does not go away and I cannot use matlab. How can I solve this? Iam using Debian. I just installed matlab 2026a. It seemed that everything was fine during installation.
When I try to start matlab, I see a flu window. In front of that window I see a blue small page writing MATLAB. It does not go away and I cannot use matlab. How can I solve this? starting matlab, linux MATLAB Answers — New Questions

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I have a script that reads inputs from an excel file, then stores specific arrays that I need, as different variables.
These will later need to be written to an output txt file along with other strings (this output needs to be a specific format so it can feed an executable).
My problem is that when I read the data from the excel file, MATLAB keeps changing only two of the values to scientific notation.
My code is structured like so:
DATAINEED = readtable(fullfile(input_location,filename));
array1 = unique(DATAINEED.array1);
array2 = unique(DATAINEED.array2);
My problem is MATLAB then stores "array1" like so when I open the variable:
1000
2000
3000
4e+03
5000
6e+03
If I type "array1" in the command window, it prints out just fine (1000, 2000, 3000, 4000…etc.)
The problem is, if I try to print the variable along with another string so it can feed into the text file, it keeps that weird scientific notation for the couple of values.
I’m using the following code:
OutputRow1 = "array1 has: "+sprintf(‘%d ‘,array1’);

This results in:
OutputRow1 =
"array1 has: 1000 2000 3000 4e+03 5000 6e+03"
Array 2 is completely fine (also an array of numbers, but not in the thousands). I’ve tried format short g and long g, doesn’t help. Wondering if anyone has any insights, suggestions or other ways to accomplish what I need.I have a script that reads inputs from an excel file, then stores specific arrays that I need, as different variables.
These will later need to be written to an output txt file along with other strings (this output needs to be a specific format so it can feed an executable).
My problem is that when I read the data from the excel file, MATLAB keeps changing only two of the values to scientific notation.
My code is structured like so:
DATAINEED = readtable(fullfile(input_location,filename));
array1 = unique(DATAINEED.array1);
array2 = unique(DATAINEED.array2);
My problem is MATLAB then stores "array1" like so when I open the variable:
1000
2000
3000
4e+03
5000
6e+03
If I type "array1" in the command window, it prints out just fine (1000, 2000, 3000, 4000…etc.)
The problem is, if I try to print the variable along with another string so it can feed into the text file, it keeps that weird scientific notation for the couple of values.
I’m using the following code:
OutputRow1 = "array1 has: "+sprintf(‘%d ‘,array1’);

This results in:
OutputRow1 =
"array1 has: 1000 2000 3000 4e+03 5000 6e+03"
Array 2 is completely fine (also an array of numbers, but not in the thousands). I’ve tried format short g and long g, doesn’t help. Wondering if anyone has any insights, suggestions or other ways to accomplish what I need. I have a script that reads inputs from an excel file, then stores specific arrays that I need, as different variables.
These will later need to be written to an output txt file along with other strings (this output needs to be a specific format so it can feed an executable).
My problem is that when I read the data from the excel file, MATLAB keeps changing only two of the values to scientific notation.
My code is structured like so:
DATAINEED = readtable(fullfile(input_location,filename));
array1 = unique(DATAINEED.array1);
array2 = unique(DATAINEED.array2);
My problem is MATLAB then stores "array1" like so when I open the variable:
1000
2000
3000
4e+03
5000
6e+03
If I type "array1" in the command window, it prints out just fine (1000, 2000, 3000, 4000…etc.)
The problem is, if I try to print the variable along with another string so it can feed into the text file, it keeps that weird scientific notation for the couple of values.
I’m using the following code:
OutputRow1 = "array1 has: "+sprintf(‘%d ‘,array1’);

This results in:
OutputRow1 =
"array1 has: 1000 2000 3000 4e+03 5000 6e+03"
Array 2 is completely fine (also an array of numbers, but not in the thousands). I’ve tried format short g and long g, doesn’t help. Wondering if anyone has any insights, suggestions or other ways to accomplish what I need. array, scientific notation, matlab, sprintf, storing variables, double MATLAB Answers — New Questions

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hello,

I am encountering a problem when trying to format a picture that I insert into a PowerPoint slide generated from MATLAB using the Report Generator toolbox, mlreportgen.ppt? Specifically, I cannot apply a solid border around the image.

I’ve attached a MATLAB script that creates a figure and inserts it into the presentation. I’ve tried several approaches (e.g., setting the BorderColor, BorderWidth, and using a PictureStyle), but none of them produce any border, they appears to be ignored. I have tried vers 2022a and 2025a.

Could someone advise on the correct way to add a solid, colored border to an image in a PPT slide.hello,

I am encountering a problem when trying to format a picture that I insert into a PowerPoint slide generated from MATLAB using the Report Generator toolbox, mlreportgen.ppt? Specifically, I cannot apply a solid border around the image.

I’ve attached a MATLAB script that creates a figure and inserts it into the presentation. I’ve tried several approaches (e.g., setting the BorderColor, BorderWidth, and using a PictureStyle), but none of them produce any border, they appears to be ignored. I have tried vers 2022a and 2025a.

Could someone advise on the correct way to add a solid, colored border to an image in a PPT slide. hello,

I am encountering a problem when trying to format a picture that I insert into a PowerPoint slide generated from MATLAB using the Report Generator toolbox, mlreportgen.ppt? Specifically, I cannot apply a solid border around the image.

I’ve attached a MATLAB script that creates a figure and inserts it into the presentation. I’ve tried several approaches (e.g., setting the BorderColor, BorderWidth, and using a PictureStyle), but none of them produce any border, they appears to be ignored. I have tried vers 2022a and 2025a.

Could someone advise on the correct way to add a solid, colored border to an image in a PPT slide. matlab generated powerpoint slides MATLAB Answers — New Questions

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We are attempting to show, in one plot, the differences in values (through time) observed by three different instrument types. These instruments were measuring fluctuations in the speed of a fluid at different elevations above the bed, for the same time period (60 seconds). We deployed a vertical transect of 9 instruments of type A, at every 10 cm, recording data at 2 Hz. We delpoyed 2 of instrument type B, at 0.5 and 1.0m, recording data at 32 Hz. We have obsevrations from instrument C, at every 10 cm (up to 1m), at 240 Hz. What I would like to do, is plot the data as:
x axis: shear velocity value
y axis: elevation of observation
data points: box or violins plots of the data observed at that elevation, to represent the distribution of values (variable along the x axis over the entire 60 sec) at a constant elevation (y axis) with colors indicating which instrument.
I’ve attached a sketch of what I envision. The box plots will show the distribution of values in time observed by each instrument, at each elevation. I cannot find a way to create this plot (I’ve searched and searched, but must not be using the right combination of terms). Do any of you know of existing commands? Or perhaps have suggestions for how to write my own function(s) to create this?We are attempting to show, in one plot, the differences in values (through time) observed by three different instrument types. These instruments were measuring fluctuations in the speed of a fluid at different elevations above the bed, for the same time period (60 seconds). We deployed a vertical transect of 9 instruments of type A, at every 10 cm, recording data at 2 Hz. We delpoyed 2 of instrument type B, at 0.5 and 1.0m, recording data at 32 Hz. We have obsevrations from instrument C, at every 10 cm (up to 1m), at 240 Hz. What I would like to do, is plot the data as:
x axis: shear velocity value
y axis: elevation of observation
data points: box or violins plots of the data observed at that elevation, to represent the distribution of values (variable along the x axis over the entire 60 sec) at a constant elevation (y axis) with colors indicating which instrument.
I’ve attached a sketch of what I envision. The box plots will show the distribution of values in time observed by each instrument, at each elevation. I cannot find a way to create this plot (I’ve searched and searched, but must not be using the right combination of terms). Do any of you know of existing commands? Or perhaps have suggestions for how to write my own function(s) to create this? We are attempting to show, in one plot, the differences in values (through time) observed by three different instrument types. These instruments were measuring fluctuations in the speed of a fluid at different elevations above the bed, for the same time period (60 seconds). We deployed a vertical transect of 9 instruments of type A, at every 10 cm, recording data at 2 Hz. We delpoyed 2 of instrument type B, at 0.5 and 1.0m, recording data at 32 Hz. We have obsevrations from instrument C, at every 10 cm (up to 1m), at 240 Hz. What I would like to do, is plot the data as:
x axis: shear velocity value
y axis: elevation of observation
data points: box or violins plots of the data observed at that elevation, to represent the distribution of values (variable along the x axis over the entire 60 sec) at a constant elevation (y axis) with colors indicating which instrument.
I’ve attached a sketch of what I envision. The box plots will show the distribution of values in time observed by each instrument, at each elevation. I cannot find a way to create this plot (I’ve searched and searched, but must not be using the right combination of terms). Do any of you know of existing commands? Or perhaps have suggestions for how to write my own function(s) to create this? box plot, violin plot, scatter plot MATLAB Answers — New Questions

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