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Bjorn Gustavsson


UIT, the Arctic University of Norway

262 total contributions since 2015

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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...

14 dagar 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...

14 dagar 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...

16 dagar ago | 0

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How to edit matlab saved file?
I think something like this should work: filename2edit = 'something.mat'; load(filename2edit,'X2change') X2change(3) = 12; s...

18 dagar ago | 0

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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

19 dagar ago | 0

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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...

20 dagar ago | 0

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partial differentating a matrix by a vector
Have a look at the help and documentation for jacobian. HTH

22 dagar ago | 0

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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...

23 dagar 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...

24 dagar 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]; %...

25 dagar ago | 0

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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...

27 dagar ago | 0

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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...

27 dagar ago | 0

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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

29 dagar 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...

29 dagar ago | 0

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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(...

ungefär en månad ago | 1

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Answered
How to find angle between two lines?
Look and you will find. HTH

ungefär en månad ago | 0

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...

ungefär en månad ago | 0

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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...

ungefär en månad ago | 0

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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

ungefär en månad 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...

ungefär en månad ago | 0

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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...

ungefär en månad ago | 0

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Answered
Plotting graph with variables on x axis
Something like this: y = randn(123,1); x = linspace(0,1,123); plot(x,y) xtstr = {'0','0.2d','0.4d','0.6d','0.8d','1d'}; set...

ungefär en månad ago | 0

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Answered
Dynamic model of a bending spring
Start reading up on the topic of beam-theory. Then come back with matlab or ODE/PDE-based questions which are more suitable for ...

ungefär en månad ago | 0

Answered
How to assign to an already 3d surface a colormap based on a set of values ?
This is how I'd do this: surf(x,y,z,Temps),shading flat This you dont have to view from above. HTH

ungefär en månad ago | 0

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i want to fill zeros inbetween vector elements
Looks like you should turn to matlab's sparse arrays. Something like this should be a shortest-ish code-snippet to do what you n...

ungefär en månad ago | 0

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Coherence as a function of time
Have a look at mscohere, and its help and documentation. It should allow you to calculate the coherence. My version resides in t...

ungefär en månad ago | 0

Answered
Using spectralFlux to plot Flux of a vector
It is not at all clear what you want to do, spectral flux is not a term I've heard before - this might be because I'm ignorant, ...

ungefär en månad ago | 0

Answered
matrix contain index track
Sure: I = [1, 3, 1, 4; 2, 3, 2, 4]; % Then operate away... But it is very unclear if that is what you really want. Do...

ungefär en månad ago | 0

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Problems with waitbar sizing
Have a look at this command-line progress-bar version. It is less visually intrusive when working with other stuff while matlab ...

ungefär en månad ago | 0

Answered
Histogram with circular bars
I would do something like this: edges = 0:15:360; N_all(1,:) = histcounts(M1,edges);% Put one histogram per row into N_all N_...

ungefär en månad ago | 0

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