# lvn

Last seen: 10 månader ago Active since 2013

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How do I create a logarithmic scale colormap or colorbar?
set(gca,'ColorScale','log') https://nl.mathworks.com/help/matlab/ref/matlab.graphics.axis.axes-properties.html#budumk7-ColorSca...

9 månader ago | 27

Solved

Block average
Given a matrix, calculate the block average of each disjoint sub-matrix of the same size. Assume that the size of the matrix alo...

mer än ett år ago

Submitted

Conservative regridding
Interpolates/regrids the 1D (interval) or 2D (surface) data onto a finer grid so that the total/average is conserved

nästan 3 år ago | 3 downloads |

Solved

Positive Infinity
Round the array a towards positive infinity

ungefär 4 år ago

Solved

Length of a short side
Calculate the length of the short side, a, of a right-angled triangle with hypotenuse of length c, and other short side of lengt...

ungefär 4 år ago

How can I recursively process files in subdirectories using MATLAB?
It is high time Matlab updates some of the official answers, as many are outdated. This is an example, as of R2016b, no need fo...

mer än 4 år ago | 3

Reducing Density in Geographical Data
You first have to get the indices of which elements are preserved. With those you can construct new elevation, and length vector...

nästan 5 år ago | 0

How can I change the colormap for each tab in a tabbed figure?
The code you gave didn't run on my PC because of a problem with viewshed. The following code runs and does not show the problem ...

nästan 5 år ago | 0

| accepted

How to change the line width for fplot?
Starting in R2016a, you can specify the 'LineWidth' property the same way you do for plot. For example: >> fplot(x1,[0,2],'k','...

mer än 5 år ago | 10

| accepted

Solved

Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

mer än 6 år ago

Question

Fat and ugly lines in eps export
I have a high resolution map of the world. When I try to export it as an eps with print('-depsc','-painters', '-loose','tes...

mer än 8 år ago | 0 answers | 0

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Ho to plot a pressure map?
Looks to me like you are looking for an interpolation function to move to a finer grid. See here for the 2D version: <http://mat...

mer än 8 år ago | 0

Question

How to generate surface preserving probability density function from histogram
I have a histogram with non uniform bins. From this I would like to estimate a smooth probability density function(basically a...

ungefär 9 år ago | 1 answer | 0

### 1

Question

VPA behavior, workaround requested
Does anybody now a workaround for this behaviour of vpa?: syms a b c c=a+b; a=1; b=1; vpa(c) ans = a + b ...

ungefär 9 år ago | 1 answer | 0

### 1

Any recommendation how to vectorize this double for loop?
A couple of things: 1. If size(MM(looper,:),1) is independent of looper (as you suggest?), you can simply precalculate it bef...

mer än 9 år ago | 0

Question

Symbolic array pre-allocation
Symbolic array pre-allocation only allocates pointers as I understood it from reading the forum. This is causing a major slowdow...

mer än 9 år ago | 1 answer | 0

### 1

Question

Most populated range of floating point numbers in array
histc can be used on a floating point array to find the bin with the largest number of elements. However these bins are fixed, a...

nästan 10 år ago | 2 answers | 0

### 2

Elegant way to know in which iteration of for I am
This should do it: if (protocol_ID==1 || protocol_ID==4) && n_runs > N_categories( 1 ) .. elseif (protocol_ID==6 |...

ungefär 10 år ago | 0

how to assign the pixel to clusters based on euclidean distance ??
<http://www.mathworks.nl/help/stats/kmeans.html>

ungefär 10 år ago | 0

How to solve 3 equations with 3 unknowns using 'for' loop?
I guess you are meant to solve these equations by iteration? Something like this would do x=1;y=1;z=1; for l=1:30 ...

ungefär 10 år ago | 0

| accepted

Plot at the same figure
The problem are these lines: figure1 = figure('Color',[0 1 1]); axes1 = axes('Parent',figure1,'FontSize',12,'FontName','...

ungefär 10 år ago | 0

| accepted

Problem to add greek chars as ticklabel
It does not seem supported, but there is a work around: <http://www.mathworks.com/matlabcentral/answers/102053-how-can-i-make...

ungefär 10 år ago | 1

| accepted

Extra term in "min" function in while loop
I guess it is a remainder of some old code. It can be removed, it does nothing!

ungefär 10 år ago | 1

How to extrapolate data from a matrix of x axis values and corresponding y axis values?
This is for a linear extrapolation: interp1(x,y,4,'linear','extrap') ans = 2.5000e+03

ungefär 10 år ago | 0

How to plot a circle on top of my plotted image

ungefär 10 år ago | 0

3D matrix manipulation. FInd values of given positions
This should do it: sum(matrix2(matrix1~=0))

ungefär 10 år ago | 0

| accepted

Input data from one array to another
The main problem with your code was the double for loop. Even if a match was found, for say j=50; it was overwritten in the seco...

ungefär 10 år ago | 0

| accepted

what is the function of 'eval' ?
Eval can be used to run matlab commands which are not known in advance, but only at runtime. In your example eval executes the c...

mer än 10 år ago | 0

| accepted