Answered

Curve fitting of a custom equation with a predefined value

For this type of problems I typically use the basic optimization-functions of matlab - either fminsearch or lsqnonlin depending ...

Curve fitting of a custom equation with a predefined value

For this type of problems I typically use the basic optimization-functions of matlab - either fminsearch or lsqnonlin depending ...

15 hours ago | 0

| accepted

Answered

how to get eigenvalues of a function matrix?

To calculate the eigenvalues of H you have to chose, either to use your implementation where H is a handle to a function returni...

how to get eigenvalues of a function matrix?

To calculate the eigenvalues of H you have to chose, either to use your implementation where H is a handle to a function returni...

29 days ago | 0

| accepted

Answered

How do I create a new folder each time I run a code?

This is easily solved: dirname = fullfile(path_2_root_dir,sprintf('NewFolder-%s',datestr(now,'yyyymmdd-HHMMSS'))); mkdir(dirna...

How do I create a new folder each time I run a code?

This is easily solved: dirname = fullfile(path_2_root_dir,sprintf('NewFolder-%s',datestr(now,'yyyymmdd-HHMMSS'))); mkdir(dirna...

1 month ago | 0

Answered

Images don't show properly with imshow after certain calculation

When you do things like this the errors are always (in my experience) in different normalizations and type-castings. To work the...

Images don't show properly with imshow after certain calculation

When you do things like this the errors are always (in my experience) in different normalizations and type-castings. To work the...

1 month ago | 0

| accepted

Answered

Press " " to rename 4 instances of "VariableName1" to "VariableName2"

That ought to be the return key... HTH

Press " " to rename 4 instances of "VariableName1" to "VariableName2"

That ought to be the return key... HTH

1 month ago | 0

Answered

How to compute SVD of a matrix without using in-build SVD command?

So this is a homework task, right? (Unless you come up with a good reason this is the case everyone have to come to this conclus...

How to compute SVD of a matrix without using in-build SVD command?

So this is a homework task, right? (Unless you come up with a good reason this is the case everyone have to come to this conclus...

2 months ago | 0

Answered

analytical solution of ODEs

This should be done thisly: syms r syms T(r) dTdr = diff(T) d2Tdr2 = diff(T,2) T = dsolve(1*d2T+((1/r)*dT) ==1,T(0.005)==20...

analytical solution of ODEs

This should be done thisly: syms r syms T(r) dTdr = diff(T) d2Tdr2 = diff(T,2) T = dsolve(1*d2T+((1/r)*dT) ==1,T(0.005)==20...

2 months ago | 0

Answered

How to graphically/interactively select region of interest from 3D point cloud data

In newer versions of matlab there seems to be just such a feature, see: ROI.CUBOID For older versions of matlab (I vaguely rec...

How to graphically/interactively select region of interest from 3D point cloud data

In newer versions of matlab there seems to be just such a feature, see: ROI.CUBOID For older versions of matlab (I vaguely rec...

2 months ago | 0

| accepted

Answered

Obtaining a equation in two variables (x and y) from a set of data points

What you should do depends on your objective. If you very explicitly want a function you could use spap2 (and perhaps some of it...

Obtaining a equation in two variables (x and y) from a set of data points

What you should do depends on your objective. If you very explicitly want a function you could use spap2 (and perhaps some of it...

2 months ago | 1

| accepted

Answered

Hello, we have received a Matlab code in school and the assignment is to explain what it means. I wonder if anybody could take us through the code and explain it?

At the matlab command-line prompt type: dpstop in nameiofscript where nameiofscript is the name of the script-file. Then you r...

Hello, we have received a Matlab code in school and the assignment is to explain what it means. I wonder if anybody could take us through the code and explain it?

At the matlab command-line prompt type: dpstop in nameiofscript where nameiofscript is the name of the script-file. Then you r...

2 months ago | 0

Answered

How to obtain CDF from large dataset?

Have a look at the help and documentation of the function ksdensity - that is one way to do this with the least amount of assump...

How to obtain CDF from large dataset?

Have a look at the help and documentation of the function ksdensity - that is one way to do this with the least amount of assump...

2 months ago | 0

Answered

Difference in frequency domain between mp3 and wav

There are some small differences. You should also try to compare the spectrograms of the two signals, see the help for spectrogr...

Difference in frequency domain between mp3 and wav

There are some small differences. You should also try to compare the spectrograms of the two signals, see the help for spectrogr...

2 months ago | 0

Answered

How to edit matlab saved file?

I think something like this should work: filename2edit = 'something.mat'; load(filename2edit,'X2change') X2change(3) = 12; s...

How to edit matlab saved file?

I think something like this should work: filename2edit = 'something.mat'; load(filename2edit,'X2change') X2change(3) = 12; s...

3 months ago | 0

Answered

I would like to plot Histogram and relative frequencies from a given dada.txt. I already plot time series plot for the given data. KIndly help me to plot histogram and relative freqs.

Have a good look at the help and documentation of histogram function. It should let you solve this task easily. HTH

I would like to plot Histogram and relative frequencies from a given dada.txt. I already plot time series plot for the given data. KIndly help me to plot histogram and relative freqs.

Have a good look at the help and documentation of histogram function. It should let you solve this task easily. HTH

3 months ago | 0

Answered

Solving 4th order ode problem

In general you convert a high-order ODE to a set of first order ODEs like in this example below (I will use a simple equation of...

Solving 4th order ode problem

In general you convert a high-order ODE to a set of first order ODEs like in this example below (I will use a simple equation of...

3 months ago | 0

Answered

partial differentating a matrix by a vector

Have a look at the help and documentation for jacobian. HTH

partial differentating a matrix by a vector

Have a look at the help and documentation for jacobian. HTH

3 months ago | 0

| accepted

Answered

Is it possible to plot a 3D graph with non numerical values?

The simplest method might be to map your classes to some integer range and then use the standard plotting functions. In your cas...

Is it possible to plot a 3D graph with non numerical values?

The simplest method might be to map your classes to some integer range and then use the standard plotting functions. In your cas...

3 months ago | 0

Answered

How to display figure in full-screen mode programmatically and save as a high resolution image?

To save as high-resolution, I regularly use: print('-depsc2','-painters','J.eps') If you desperately want the image as a png-i...

How to display figure in full-screen mode programmatically and save as a high resolution image?

To save as high-resolution, I regularly use: print('-depsc2','-painters','J.eps') If you desperately want the image as a png-i...

3 months ago | 1

Answered

How to store 2D variables in matrix

For the storing the point coordinates you might look at either cell-arrays: r1 = [1,2,3]; r2 = [3,2,5]; r3 = [4.5,pi,1,5]; %...

How to store 2D variables in matrix

For the storing the point coordinates you might look at either cell-arrays: r1 = [1,2,3]; r2 = [3,2,5]; r3 = [4.5,pi,1,5]; %...

3 months ago | 0

Answered

Problem getting number of ticks and labels to work properly

Do you get your xticks at the even years with the xticklabels for the first 6 years? You can at least check the x-tick values w...

Problem getting number of ticks and labels to work properly

Do you get your xticks at the even years with the xticklabels for the first 6 years? You can at least check the x-tick values w...

3 months ago | 0

Answered

De-resolution of Dicom Image

So you problem is that you cannot figure out how to save a file to a new same-name file in another directory? If so something l...

De-resolution of Dicom Image

So you problem is that you cannot figure out how to save a file to a new same-name file in another directory? If so something l...

3 months ago | 0

Answered

A switch case statement that will help me to either run codeS in Windows or linux, based on whichever OS it is

Have a look at the commands: computer, ispc, insunix, ismac. HTH

A switch case statement that will help me to either run codeS in Windows or linux, based on whichever OS it is

Have a look at the commands: computer, ispc, insunix, ismac. HTH

3 months ago | 0

Answered

zoom plot into plot

Maybe this file exchange contribution does what you need: zoomplot Or any of these: on-figure-magnifier, maginset, interactiv...

zoom plot into plot

Maybe this file exchange contribution does what you need: zoomplot Or any of these: on-figure-magnifier, maginset, interactiv...

3 months ago | 0

Answered

How to find angle between two lines?

A more stable method that what Jos suggested is v_1 = [x2,y2,0] - [x1,y1,0]; v_2 = [x3,y3,0] - [x1,y1,0]; Theta = atan2(norm(...

How to find angle between two lines?

A more stable method that what Jos suggested is v_1 = [x2,y2,0] - [x1,y1,0]; v_2 = [x3,y3,0] - [x1,y1,0]; Theta = atan2(norm(...

3 months ago | 1

| accepted

Answered

Integrating function of t over numerical values

Yes, that means that the function you call integral with is called with an array of values - therefore your function (the long e...

Integrating function of t over numerical values

Yes, that means that the function you call integral with is called with an array of values - therefore your function (the long e...

3 months ago | 0

| accepted

Answered

Multiple color plots / colorbars on a single axes

There are some contributions on the file exchange that deals with this. I thik this is one: colormat-and-colorbar-utilities You...

Multiple color plots / colorbars on a single axes

There are some contributions on the file exchange that deals with this. I thik this is one: colormat-and-colorbar-utilities You...

3 months ago | 0

| accepted

Answered

Given 2 red beads, 2 blue beads, 1 yellow bead, and 1 green bead, how many different necklaces can be made?

Why not just remove the non-unique necklaces? See the help and documentation for unique for how to do this. HTH

Given 2 red beads, 2 blue beads, 1 yellow bead, and 1 green bead, how many different necklaces can be made?

Why not just remove the non-unique necklaces? See the help and documentation for unique for how to do this. HTH

3 months ago | 0

Answered

stream lines for discrete data set of velocities

Your question is a bit too vague. Or rather, the input-data you have is a bit vaguely described. The answer depends on how you'l...

stream lines for discrete data set of velocities

Your question is a bit too vague. Or rather, the input-data you have is a bit vaguely described. The answer depends on how you'l...

3 months ago | 0

| accepted

Answered

Is there a way to Un-clip a sine wave?

You can do something like this: sfcn = @(t,pars) pars(1)+pars(2)*sin(pars(3)*t+pars(end)); % sine-like function with offset and...

Is there a way to Un-clip a sine wave?

You can do something like this: sfcn = @(t,pars) pars(1)+pars(2)*sin(pars(3)*t+pars(end)); % sine-like function with offset and...

3 months ago | 0

| accepted