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How to select specific values and corresponding cell positions from 31 x 12 matrix?
Because the number of rows in B is not fixed, you can store the result of your check in a cell array % create the matrix A = (...

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I have a problem with integration "Error using / Matrix dimensions must agree"
When you define your functions use ./ instead of / %function f=(x+(1./x)).^2; %real value of integral ff=@(x)(x+(1./x)).^2;

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Cause of: "Error: Inputs must be floats, namely single or double."
What I can see is 1) Fs is missing. In any case, tspan shpuld be a 2 entries array with initial and final values tspan = [0,15...

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how to convert cell to matrix ?
A = cell2mat(cellfun(@str2num,x,'UniformOutput',false))

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Possible to modify only one portion of an array in one line?
x(x > xMax & 1:length(x) > transition) = xMax

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How to compare the closest value in the matrix?
% your data unknownM = [0.8105 1.1581 0.6295 0.9594 0.8447 0.7103 0.8429 0.5372 0.9882 0.8924]; sud...

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how can I create a 4D matrix and use it for interpolation
% your vectors Wpig=0.5:0.5:7; Chla=0.5:0.01:0.6; Starch=0:0.04:0.24; Now you need to sample uniformly the space using your...

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How can i break down the values of vector into group of five?
If x is your vector you can reshape it y = reshape(x,5,numel(x)/5); and access each column with indexing % column 10 iCol = ...

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index in position 2 exceeds array bounds ( must not exceed 1).
Difficult to say without file, code, etc. The wizard says that the new excel file has only one column, but the code expects tw...

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if statement in for loop with cell arrays
To stick with the OP snippet I added semicolons all over the place I changed the variable type in s.score to doubles I preall...

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How to create an array and fill it by these values using loop ?
% intialization and preallocation k = 1; date = strings(480,1); % string array for i = 1982:2015 for j = 1:12 ...

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Monte Carlo integration of sin(x)
This code evaluates the integral using the Monte Carlo method with increasing number of random samples, compare the result with ...

más de 4 años hace | 0

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Check if a number is in between two values
% your data a = [1,2,3,4,5,6]' b = [10,11,12,13,14,15]' Interval = [a b]; % number to check x = 8; % this finds the in...

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Assembling Element Matrices in Finite Element Method Problem
If I have understood correctly, you want to store the local 3x3 matrix in the global matrix. To do so you can (I would say must)...

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How to find corresponding row positions of specific values in a matrix?
The function min will do this for you [B,C] = min(A,[],1);

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How to convert script from fortran90 to matlab language
Again, it is difficult to check if not all code is available, however I try kB = zeros(10,1); kA = zeros(10,1); kL = 0; kS =...

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Pad with Nan according to maximum row in cell
I keep all steps separated % the data A = {rand(47,1),rand(80,1),rand(97,1)}; % pad with NaNs A = cellfun(@(x)[x(1:end); N...

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Keeping Previous Iteration changes
I see two problems in your code 1) the changes are only temporarily saved in x and x is never used 2) onec you change a letter...

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How to get rid of Nan when calculating mean
Following Steven Lord answer I would usE mean(A(isfinite(A)))

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Why is my script not working?
I try 1) I think you are caluclating the jacobian matrix. To avoid mistakes I did this symbolically and the result is >> syms...

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Parallelogram rule for vectors
Vtot = V1+V2+V3+V4

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Extract values from image
I assume you have X,Y and B as created using meshgrid, and the line is specified by start/end node % create dummy data x = lin...

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Help with nested for loop generating coordinates
The command you are looking for is meshgrid % vectors with positions x = 0.00470:.0003:.0071; y = 0.00470; z = 0:0.00005:.00...

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Is there a way of removing these for loops to speed up my code?
Profiling your code it comes up that the most demanding routine is the Green function calculation, with 0.374s: I have rewrit...

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Fit data to sawtooth shape
As usual, John is right. I tried to implement a strategy to fit sampled data with noise with a sawtooth waveform. I am pretty pr...

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Find position of a column given a specified array
idx = find(ismember([Mritsum(:) BrB(:)],point,'rows'))

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How do i plot a 3D structure as in the attached picture?
I share with you a couple of function that I use to plot grounding grids. They are attached. Then you can use the following scri...

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How to assign to an already 3d surface a colormap based on a set of values ?
Not sure if I have understood correctly. I try. I assume that you have the temperature plot as 2d matrix, as required by surf, b...

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How can I plot this function
You may use surf % define a suitable number of x and y divisions. Here I used 200 x = linspace(0,10,200); y = linspace(1,30,2...

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How can I extract a signal between zero up-crossings
You can take a look at this post, where zero crossing is discussed in details https://it.mathworks.com/matlabcentral/answers/26...

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