Answered

How to perform convolution with a dataset?

In matlab this should be as simple as f = A*(C*exp(alpha*t + D*exp(beta*t))); % or whatever you have for that part. G = psf; ...

How to perform convolution with a dataset?

In matlab this should be as simple as f = A*(C*exp(alpha*t + D*exp(beta*t))); % or whatever you have for that part. G = psf; ...

17 hours ago | 0

Answered

Plot a scalar as a function of a parameter

It should be as simple as: for n = 1:N for t = 2:T pipiVal(1,n) = pipiC(t,n); % or however you get the phipi-values cor...

Plot a scalar as a function of a parameter

It should be as simple as: for n = 1:N for t = 2:T pipiVal(1,n) = pipiC(t,n); % or however you get the phipi-values cor...

17 hours ago | 0

Answered

How do I create a colormap for a flat plane?

Use something like this: surf(x,y,z-1,x+0.5*y),shading flat You can use whichever linear combination of x and y to have your g...

How do I create a colormap for a flat plane?

Use something like this: surf(x,y,z-1,x+0.5*y),shading flat You can use whichever linear combination of x and y to have your g...

3 days ago | 0

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Answered

PLOT THE GRAPH OF VECTOR FUNCTIONS

So you want to plot a vector-function , where gives you 3-element vectors at points in 3-D space. For that you might get what...

PLOT THE GRAPH OF VECTOR FUNCTIONS

So you want to plot a vector-function , where gives you 3-element vectors at points in 3-D space. For that you might get what...

5 days ago | 1

Answered

How do I plot interpolated grid data and original datapoint set in the same plot?

You can always simply plot all your points: plot3(Xi,Yi,Zi,'r.') Or with scatter: scatter(Xi,Yi,32,Zi,'filled') But to me th...

How do I plot interpolated grid data and original datapoint set in the same plot?

You can always simply plot all your points: plot3(Xi,Yi,Zi,'r.') Or with scatter: scatter(Xi,Yi,32,Zi,'filled') But to me th...

6 days ago | 0

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Answered

How to save figures from foor loop in separate folders

Generate your file-names with fullfile (that way you can have multiple directories in a cell-array, one for each of your wanted ...

How to save figures from foor loop in separate folders

Generate your file-names with fullfile (that way you can have multiple directories in a cell-array, one for each of your wanted ...

7 days ago | 0

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Answered

How to integrate a function u^3/(exp(u)-1) in the range of [0 0.033]??.

if numerical integration is good enough: Val = integral(@(x) x.^3./(exp(x)-1),0,0.033) % for which I get: 1.1831e-05 HTH

How to integrate a function u^3/(exp(u)-1) in the range of [0 0.033]??.

if numerical integration is good enough: Val = integral(@(x) x.^3./(exp(x)-1),0,0.033) % for which I get: 1.1831e-05 HTH

7 days ago | 0

Answered

maximum value in scatter plot

Well that sounds like a task for histogram2, or any of the number of 2-D histogram functions available on the file exchange. The...

maximum value in scatter plot

Well that sounds like a task for histogram2, or any of the number of 2-D histogram functions available on the file exchange. The...

7 days ago | 0

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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...

11 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...

12 days ago | 1

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...

13 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 ...

13 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...

14 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 ...

14 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 = ...

16 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

17 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-...

18 days ago | 0

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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 (...

19 days ago | 1

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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...

23 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

25 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 ...

28 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...

28 days ago | 0

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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 ...

28 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...

28 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), ...

1 month ago | 1

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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...

1 month ago | 0

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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