Answered
How to change background color of a surf
pcolor(x,y,z) axis off % box on % shading interp % colorbar

6 years ago | 0

Answered
How to compare values within a matrix?
In case are you looking for this? idx = find(accuracy < 0.05)

6 years ago | 0

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Calculating the distance/error between two graphs when the coordinates are given. Coordinates are not of equal size
You can get A to the size of B using interpolation vice versa. Read about it. % Get A to the size of B using interpolation [...

6 years ago | 0

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Answered
how to make intersection?
Read about knnsearch. With this you can pick the nearest point to the given point. Or you can use this file exchange: https://...

6 years ago | 0

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function for sum of each two next values
Let V and p be your arrays of velcoity and power. k = 2; A = 9; f = exp(-(v(1:end-1)/A).^k) - exp(-(v(2:end)/A).^k); H ...

6 years ago | 0

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Answered
Why my data is not plotting the graph using plot(Q,h)
q = [0:1:100]; h = zeros(size(q)) ; for Q = 1:length(q) if val < h1 % < --- think of this line v_2 = ((Q/1...

6 years ago | 1

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Answered
Fig file extraction of data and legend from plots
If your extracted data is a matrix.....the order of legend should be order of rows.

6 years ago | 0

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what means this?
iter,eps: iter is number of iterations. eps stand for a small value. So your code runs either for 10 iterations or till the erro...

6 years ago | 0

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Answered
How to extract specific data from the data files?
iwant = interp1(CL,CD,0.6) This is the procedure: CL = [ 0.572526 0.601916 0.631107 ]; CD = [ 0.024868 0.025337 0.02590...

6 years ago | 0

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Answered
Fill area inside 4 connected lines in a plot
Read about padzeros, padarrays. A = ones(5,4) ; iwant = zeros(8) ; iwant(3:7,3:6) = A ;

6 years ago | 0

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Answered
Do not take any amount
pop=randi([100],20,8); [r1,c1]=size(pop); pool = zeros([],c1) ; count = 0 ; for i=1:r1 A=randi(100); if A<=90 ...

6 years ago | 1

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Answered
Problem using imagesc plot for non uniform values
data = importdata("data_analysis.txt") ; x = data(:,1) ; y = data(:,2) ; z1 = data(:,3) ; z2 = data(:,4) ; % Use int...

6 years ago | 0

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Answered
Drawing a Best Line Fit for some Points
Read about polyfit. p = polyfit(x,y,1) ; yi = polyval(p,x) ; plot(x,y,'.r') hold on plot(x,yi,'b')

6 years ago | 0

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How to include text in a running figure
You can use text/ title with sprintf. for t = 1:100 plot(rand(1,10)) ; title(sprintf("time step = %s",num2str(t))) ; ...

6 years ago | 0

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How can i take ds/dx and ds/dy of a function numerically
ds/dx=-3*x^2+3*y^2 ds/dy = 6*x*y

6 years ago | 0

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Plot variables (total could cover) from Netcdf file
Your tcdc is a 3D matrix. You can plot only one 2D matrix using pcolor. Follow the below: pcolor(longitude,latitude,tcdc(:,:,1)...

6 years ago | 0

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Answered
Counting occurance of exact word from string array
R1 = ["Ar* + Ar* "," Ar+ + Ar + e "]; % chemical reaction (string array; col1=reactants, col2=products) s = "Ar" ; n = nnz(s...

6 years ago | 0

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Comparison of specific values from the same matrix
[val,idx] = min(Z(2:end))

6 years ago | 0

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Answered
Correlate two sets of data defined on different meshings of the same surface
You can get the respective mesh Z values to a required grid, using interpolation menthods. Read about griddata, scatteredinter...

6 years ago | 0

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MSE and RMSE of a matrix
If yt and ye are the column vectors of theory and experimental values. You can get MSE, RMSE using: e = (ye - yt) % Errors ...

6 years ago | 0

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Error Plot, vectors must be of same length. I can't understand where the error is exactly
Note that your Q is a row vector and not a column vector. You should use Q(1,:), Q(2,:) not Q(:,1), Q(:,2). D = 90.5*0.4814E-3...

6 years ago | 0

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Create a series of vector with different name
s = '161724' v = [s(1:2),':',s(3:4),':',s(5:6)] If array s = ['161724'; '161725'; '161726'] ; k = repelem(":",size(s,1),1...

6 years ago | 0

Answered
Error with variable definition
t = 0:200; VaR = logninv(0.1,3,1) f = t.*logncdf(t,3,1)/0.1; % < ---- element by element operation CVaR = integral(f,-inf,...

6 years ago | 0

Answered
4 matrix generation depending on a specific value,
You can use this File eXchange: https://in.mathworks.com/matlabcentral/fileexchange/69507-npermutek s = [0 1] ; iwant1 = nper...

6 years ago | 0

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Why is fimplicit not plotting x^2 = 0 ??
x = linspace(-5,+5,100) ; y = x.^2 ; plot(x,y)

6 years ago | 0

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use a for loop to create a script that prints numbers 0 through 10, except 3 and 6
for i = 0 : 1 : 10 disp(i) if i == 3 || i == 6 printf("Value = %d\n") end end

6 years ago | 0

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Answered
Gradient of a 2D plot
M = sqrt(U.^2+W.^2) ; contour(X,Y,M)

6 years ago | 0

Answered
I have composite files of satellite images, (9 bands in one daily tif file) I need to for loop through each tif file to check quality control on them and see which pixels are 00, 01, 10, 11, to only keep the 00 and 01, and I'm not sure how to do it:(
tiffFiles = dir("*.tif") ; N = length(tiffFiles) ; for i = 1:N File = tiffFiles(i).name ; I = imread(File) ; ...

6 years ago | 0

Answered
index exceeds array bounds
m = dof(de,4) ; % I hope this is a number ne = length(b) ; % dimensions of b and ckx, cky should be same Ckx = cell(m,ne...

6 years ago | 0

Answered
changing my x increment along fplot
Why syms for this? x = 0:0.002:2 ; y1 = 7*x.^2 -8*x + 1; dy1 = 14*x-8 ; plot(x,dy1)

6 years ago | 1

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