Answered
convert real numbers to img form
a = 8 b = a*1i % method 1 c = complex(0, a) % method 2

4 years ago | 1

Answered
Restricting time on graph with given time
a = datetime(2021, 1, 1:365); b = rand(size(a)); plot(a, b) idx = find(month(a)==1); xlim([a(idx(1)), a(idx(end))])

4 years ago | 1

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How to add a cylinder to a scattered plot
% A = load ('Data.txt'); A = 0.05*rand(8, 4) x = A (:,1 ) ; y = A (:,2 ) ; z = A (:,3 ) ; Amplitude = A (:,4) ; scatter3 ...

4 years ago | 0

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Answered
Calculating mean square difference (MSD) of two matrices
Im = [0 252 204; 221 135 58; 156 122 127] Im2 = [169 250 237; 186 196 148; 227 148 4] F2 = sum(sum(mean(Im...

4 years ago | 0

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Answered
how to save variable as txt in a specified location with variable value appearing in the file name
a=1; % amplitude du faisceau gaussien x=linspace(-50,50,100); dx=50/2.355; % widthn f=a*exp(-0.5*(x./dx).^2); [pks, locs, wi...

4 years ago | 0

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Answered
Quiver plot when axes scale are too different result in very ugly plots
load("quiverPlotVariables.mat") whos % You need to scale the vdot and/or psidot so that they are representing % the true orie...

4 years ago | 0

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How can delete the variable part?
s = load("T9S11.mat"); x = s.T9S11 x(2:2:end,:)=[]

4 years ago | 1

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Answered
repmat usage for cellarray
data_string = reshape(char(32:127), 3, []) % some characters32 x 3 char aray cell_array=repmat({data_string},1,3) cell_array{...

4 years ago | 0

Answered
Append vector into zero matrix
v = zeros(5, 3); x = randn(3,1); n = numel(x); for i=1:size(v, 2) v(i-1+(1:n), i) = x; end v

4 years ago | 0

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Answered
benefits of using "Structs" over "Cells" in MATLAB/Octave?
See the documentation: https://www.mathworks.com/help/matlab/matlab_prog/cell-vs-struct-arrays.html Struct use field name to ac...

4 years ago | 0

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Marker edges, line width and legend
xx=linspace(0,12); figure(1) plot(xx,sin(xx),'LineStyle','-','LineWidth',2,... 'Color','red', 'HandleVisibility','off');...

4 years ago | 0

Answered
Modify a text file
% Assume that your text file is data.txt s = fileread("data.txt"); s = strrep(s, '4.500000e-001', '0.8000'); fid = fopen('d...

4 years ago | 0

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nanstd use in matlab
You are using default normalization "[]", which normalised the std by (N-1). If you want to get 0.0129, you need to change [] i...

4 years ago | 1

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Answered
What's wrong in the code? I cant generate the same graph as the question required.
x = -5:0.1:5; y = sin(x.^2).*exp(cos(x)); plot(x,y)

4 years ago | 0

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Answered
I have problem with while loop.
Make the following change: %while (szb(1,1)~=szA(1,1) && szb(1,2)~=1) while (szb(1,1)~=szA(1,1) || szb(1,2)~=1)

4 years ago | 1

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Answered
Solution found by matlab is too big to use
There are two solution of the equation. You need to select one. The modified code choose the 1st solution. You can always to ...

4 years ago | 0

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How to create one common colorbar and colorscale for subplots
You need to add in the following inside the loop for each subplot: caxis([0 60]); % adjust the number 60 or find the value fr...

4 years ago | 0

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Answered
Trying to do product of eigenvalues collected from a matrix
First the difference "e" (as below) will not be perfectly 0 and it is subjected to computational accuracy. Second, the eigen va...

4 years ago | 0

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Why does my function return a single value instead of an array? I need it to return an array so I can plot it.
Use ./ instead of / for array operation. [Note that there is division by 0 in your equation] Dn2 = @(n) (1-exp(-1j*pi*n/2))./(...

4 years ago | 0

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Using textscan() to get data from a TXT file, but all cells are NaN
Your format specifier is not correct. s=["1,2,3,4" "2,4,5,7"] V = textscan(s(1),'%f %f %f %f','Delimiter',',') V = tex...

4 years ago | 0

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Answered
Reshape a row vector and convert it to a cell array
x = [1:10, 101:110, 11:20, 111:120]; x = reshape(x, [20, 2])'; C = mat2cell(x, [1 1], [10 10])'

4 years ago | 1

Answered
How to fix this error in interp1?
R = 1e3; % resistor value [Ohms] C = 1e-6; % Capacitor value [Farads] H = tf([R*C,0], [R*C,1]); % plot a bode plot (3dB frequ...

4 years ago | 1

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Precision number throughout scripts and functions.
You can use "format" command to specify a format such as short, long, shortE, shortG. "doc format" for more information. If yo...

4 years ago | 0

Answered
Rotating 3D data
clc; clear all; close all; x = linspace(-10,10,49); y = linspace(-10,10,44); [X,Y] = meshgrid(x,-y); Z = zeros(44,49); Z = ...

4 years ago | 0

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Answered
sum of series with vectors
Rhoo = 300e-5; Caplambda = 1e-4; Beta = [24 123 117 262 108 45]; lambda = [0.0127 0.031 0.116 0.3106 1.4006 3.876]; t = [0:1...

4 years ago | 0

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Derive base 10 logarithm from base 2 log output
The formula is: For any given base b, you need to compute a constant .

4 years ago | 1

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Answered
Can I use a variable name to make logical comparison?
months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "Decembe...

4 years ago | 1

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how to calculate row values based on the previous row value of a column?
a= [1,2,3,4,5,6,7,8,9,10]; b = 100; % initial value for i=1:numel(a) b= (a(i)*b)+b; fprintf("i=%2d b=%d\n", ...

4 years ago | 0

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Answered
Finding largest data from table
X1=[9 6 9 0;3 2 7 0]; X2=[0 2;4 0]; X3=[3 1 2; 8 9 7]; X4 = X1; X=table(X1,X2,X3,X4) len = table2array(varfun(@(x) size(x...

4 years ago | 0

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Answered
Plotting an array on both x and y axis and different formulas, check description
i = 0:0.1:7; j = 7:0.1:10; yi = 2*i; yj = 3*j; plot(i, yi); hold on plot(j, yj)

4 years ago | 0