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# Bjorn Gustavsson

### UIT, the Arctic University of Norway

268 total contributions since 2015

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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...

circa 6 ore ago | 0

Press " " to rename 4 instances of "VariableName1" to "VariableName2"
That ought to be the return key... HTH

2 giorni ago | 0

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...

13 giorni ago | 0

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...

14 giorni ago | 0

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...

15 giorni ago | 0

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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...

15 giorni ago | 1

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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...

circa un mese ago | 0

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...

circa un mese ago | 0

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...

circa un mese ago | 0

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

circa un mese ago | 0

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

circa un mese ago | 0

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...

circa un mese ago | 0

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

circa un mese ago | 0

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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...

circa un mese ago | 0

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...

circa un mese ago | 1

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]; %...

circa un mese ago | 0

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...

circa 2 mesi ago | 0

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...

circa 2 mesi ago | 0

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

circa 2 mesi ago | 0

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

circa 2 mesi ago | 0

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(...

circa 2 mesi ago | 1

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

circa 2 mesi ago | 0

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...

circa 2 mesi ago | 0

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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...

circa 2 mesi ago | 0

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

circa 2 mesi ago | 0

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...

circa 2 mesi ago | 0

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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...

circa 2 mesi ago | 0

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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...

circa 2 mesi ago | 0

| accepted