Answered

Create coordinates on a convex hull

Perhaps this function is overkill, but to me it seems as if this FEX-contribution should help: xy2sn, I don't know if it is the...

Create coordinates on a convex hull

Perhaps this function is overkill, but to me it seems as if this FEX-contribution should help: xy2sn, I don't know if it is the...

3 days ago | 0

Answered

how to draw a 3d surface of exp(x+iy)

Have a look at the dcolor submission to the file exchange. That should give you a good starting point for doing this. There ar...

how to draw a 3d surface of exp(x+iy)

Have a look at the dcolor submission to the file exchange. That should give you a good starting point for doing this. There ar...

4 days ago | 0

Answered

Rotate 3D quiver

Matlab uses right-handed coordinate systems (sensible), with the default convention that z is in the upward vertical direction i...

Rotate 3D quiver

Matlab uses right-handed coordinate systems (sensible), with the default convention that z is in the upward vertical direction i...

5 days ago | 0

Answered

Visualization of Euler angles

Maybe something as simple as plotting the unit-vectors before and after a rotation? That is something you can easily adapt and ...

Visualization of Euler angles

Maybe something as simple as plotting the unit-vectors before and after a rotation? That is something you can easily adapt and ...

5 days ago | 0

Answered

How do I declare and iterate a variable in an ODE driver file?

The way I read your ODE-function your Snh_in_1 is the initial value of the second component of y. If so it should be no more dif...

How do I declare and iterate a variable in an ODE driver file?

The way I read your ODE-function your Snh_in_1 is the initial value of the second component of y. If so it should be no more dif...

6 days ago | 0

Answered

Plotting a 2D crystal lattice from two primitive lattice vectors

If you do it stepwise it becomes "not too tricky": e1 = [-0.5; -sqrt(3)/2]; % Your unit e2 = [1; 0]; % vectors ...

Plotting a 2D crystal lattice from two primitive lattice vectors

If you do it stepwise it becomes "not too tricky": e1 = [-0.5; -sqrt(3)/2]; % Your unit e2 = [1; 0]; % vectors ...

7 days ago | 1

Answered

How to do matrix or table multiplication?

Looping seems simplest and most easily readable for humans: szI = size(IntakeTable); szE = size(ExhaustTable); resultTable = ...

How to do matrix or table multiplication?

Looping seems simplest and most easily readable for humans: szI = size(IntakeTable); szE = size(ExhaustTable); resultTable = ...

9 days ago | 1

Answered

This how i want the plot to be

pcolor(x,y,I),shading flat,xlabel('x-text'),ylabel('y-text'),colorbar HTH

This how i want the plot to be

pcolor(x,y,I),shading flat,xlabel('x-text'),ylabel('y-text'),colorbar HTH

9 days ago | 0

Answered

How to store large data sets with different types of information?

If you're planning to run all analysis in matlab why not just store everything in a .mat-file. In this scenario just have a sit-...

How to store large data sets with different types of information?

If you're planning to run all analysis in matlab why not just store everything in a .mat-file. In this scenario just have a sit-...

11 days ago | 0

| accepted

Answered

indepvar and depvar are of inconsistent sizes with polyfitn

Yes, you send in an array [x1,x2] of size [1 x 20] and an array y of size [ 1 x 10] into polyfitn. The polyfitn version I have (...

indepvar and depvar are of inconsistent sizes with polyfitn

Yes, you send in an array [x1,x2] of size [1 x 20] and an array y of size [ 1 x 10] into polyfitn. The polyfitn version I have (...

11 days ago | 1

| accepted

Answered

Can someone answer this?

Yes most people reading these pages can. You can too. Your learning experiece depends crucialy on your effort to learn. Check th...

Can someone answer this?

Yes most people reading these pages can. You can too. Your learning experiece depends crucialy on your effort to learn. Check th...

16 days ago | 0

Answered

Plotting 4D data

Try something like this: t = M(:,1); x = M(:,2); y = M(:,3); z = M(:,4); scatter3(x,y,z,32,t,'filled') HTH

Plotting 4D data

Try something like this: t = M(:,1); x = M(:,2); y = M(:,3); z = M(:,4); scatter3(x,y,z,32,t,'filled') HTH

17 days ago | 1

| accepted

Answered

Can anyone help in this error Error: The expression to the left of the equals sign is not a valid target for an assignment.

It looks like you should first check that the string generated by your strcat function call. To me it look like you generate an ...

Can anyone help in this error Error: The expression to the left of the equals sign is not a valid target for an assignment.

It looks like you should first check that the string generated by your strcat function call. To me it look like you generate an ...

20 days ago | 0

Answered

matrix multiplication error with too many variables in the equation .

Your first multiply are a matrix multiplication, you can achieve what you want if you make sure that C is a column-vector and t...

matrix multiplication error with too many variables in the equation .

Your first multiply are a matrix multiplication, you can achieve what you want if you make sure that C is a column-vector and t...

20 days ago | 0

| accepted

Answered

Try using or tightening upper and lower bounds on coefficients.

For arbitrary fitting tasks I personally prefer to use weighted least-square minimization using some optimization function, if ...

Try using or tightening upper and lower bounds on coefficients.

For arbitrary fitting tasks I personally prefer to use weighted least-square minimization using some optimization function, if ...

20 days ago | 0

Answered

How to obtain variables from a structure inside a for loop?

It seems that you read in entire data-sets into a number of numbered struct-variables (presumably s_1, s_2,..., s_25). Dont do t...

How to obtain variables from a structure inside a for loop?

It seems that you read in entire data-sets into a number of numbered struct-variables (presumably s_1, s_2,..., s_25). Dont do t...

20 days ago | 0

| accepted

Answered

How to plot quiver with an input of Temperature data?

Presumably your heat-flux is just proportional to the temperature gradient (assuming constant and isotropic heat conductivity), ...

How to plot quiver with an input of Temperature data?

Presumably your heat-flux is just proportional to the temperature gradient (assuming constant and isotropic heat conductivity), ...

30 days ago | 1

| accepted

Answered

Use conditional statements to separate elements from a single array into 2 new arrays

Are you trying to separate points that have no neighbours closer than HS_HS_threshold from those that have? If so this should d...

Use conditional statements to separate elements from a single array into 2 new arrays

Are you trying to separate points that have no neighbours closer than HS_HS_threshold from those that have? If so this should d...

30 days ago | 0

| accepted

Answered

How to draw cumulative histogram?

Simplest would be something like this: bins = [ 10 10 20 40 50 60 70 80 80 80 90 90 90 100 100 100 100 100 ]; data = [...

How to draw cumulative histogram?

Simplest would be something like this: bins = [ 10 10 20 40 50 60 70 80 80 80 90 90 90 100 100 100 100 100 ]; data = [...

2 months ago | 0

Answered

Problems using ODE45 using fmincon command for least square optimisation problem

Your first function is messed up with code after the end that closes the function myObjective, try this change function chisqua...

Problems using ODE45 using fmincon command for least square optimisation problem

Your first function is messed up with code after the end that closes the function myObjective, try this change function chisqua...

2 months ago | 0

Answered

How can I get then angle between a line connecting two points in the plot and a vector (with only direction specified)?

Best way to go about this is to convert the "wind"-direction to a wind-vector, then use: w_angle = atan2(norm(cross(wv,b)), dot...

How can I get then angle between a line connecting two points in the plot and a vector (with only direction specified)?

Best way to go about this is to convert the "wind"-direction to a wind-vector, then use: w_angle = atan2(norm(cross(wv,b)), dot...

2 months ago | 0

Answered

how to plot a multiple 4d array on same graph

It is still a bit unclear exactly what type of data you have, but multiple 4-D data in one graph is a lot of information to dige...

how to plot a multiple 4d array on same graph

It is still a bit unclear exactly what type of data you have, but multiple 4-D data in one graph is a lot of information to dige...

2 months ago | 0

| accepted

Answered

Error encountered with decomposing time series

try to call the function with either ,...,'model','additive') % property-value pairs or with a variable model my_model = 'add...

Error encountered with decomposing time series

try to call the function with either ,...,'model','additive') % property-value pairs or with a variable model my_model = 'add...

2 months ago | 0

Answered

Finding the correlation coefficient between two images

You should be able to get the 2 x 2 correlation matrix this way: ImgCorr = corrcoef(double(Im1(:)),double(Im2(:))); From that ...

Finding the correlation coefficient between two images

You should be able to get the 2 x 2 correlation matrix this way: ImgCorr = corrcoef(double(Im1(:)),double(Im2(:))); From that ...

2 months ago | 0

Answered

I have a variable named T_t which is of dimension [1 20]. How do i add a normal error with a standard deviation of 1 to it?

Well, you would only get a standard deviation approximately equal to 1 if you have T_t constant for all 20 elements. If you comp...

I have a variable named T_t which is of dimension [1 20]. How do i add a normal error with a standard deviation of 1 to it?

Well, you would only get a standard deviation approximately equal to 1 if you have T_t constant for all 20 elements. If you comp...

2 months ago | 0

| accepted

Answered

Visualising Volume Object Data

You could work with surf on each radial layer and set the surface property facealpha to something transparent. Perhaps something...

Visualising Volume Object Data

You could work with surf on each radial layer and set the surface property facealpha to something transparent. Perhaps something...

2 months ago | 0

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Answered

change in a image

The only meaningful interpretation I can come up with is that you have two images of the same scene taken from a static camera (...

change in a image

The only meaningful interpretation I can come up with is that you have two images of the same scene taken from a static camera (...

2 months ago | 0

Answered

use Tic Toc for function

Either scrap cellfun and loop over the elements of A, or plug tic-toc into your test-function.

use Tic Toc for function

Either scrap cellfun and loop over the elements of A, or plug tic-toc into your test-function.

2 months ago | 0

| accepted

Answered

Rename files within multiple subfolders (within multiple subfolders) to the name of the first subfolder.

Why not do something like: target_dir = fullfile('C:\Users\johan\Skrivbord\test'); source_root = fullfile('C:\Users\johan\Sk...

Rename files within multiple subfolders (within multiple subfolders) to the name of the first subfolder.

Why not do something like: target_dir = fullfile('C:\Users\johan\Skrivbord\test'); source_root = fullfile('C:\Users\johan\Sk...

2 months ago | 0

Answered

symbolic equation to numerical answer

Take a look at matlabFunction, it should be the function to use to convert a symbolic expression to a numerical functin. HTH

symbolic equation to numerical answer

Take a look at matlabFunction, it should be the function to use to convert a symbolic expression to a numerical functin. HTH

2 months ago | 0

| accepted