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Populate a column vector with values from another column vector
B = zeros(57,1); % 57x1 column vector B([4 5 7 10 11 13:end]) = A;

3 jours il y a | 0

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How to plot a semi-circle on the horizontal axis in MATLABs & How to shade half the cirlce?
Npts = 101; r = 2; c = [0 0]; theta = linspace(0,pi,Npts); x = c(1) + r.*cos(theta); y = c(2) + r.*sin(theta); fill([x...

3 jours il y a | 0

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error using patch vectors must be same length
It may be that y_avg_minus_reverse is longer than y, having been defined as longer in a previous run of the script, since the sc...

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Vertcat, I think I need to have consistent rows and columns, erroring out on B matrix creation. Can anyone show me how to make this correct?
Try this: n_col = size(AG2,2); B=[m2*AG2(1,:) m2*AG2(2,:) I2*alpha2*ones(1,n_col) m3*AG3(1,:)-force(1...

3 jours il y a | 0

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Backward stairs plot in MATLAB
x = 1:8; y = [3 1 4 3 7 3 4 2]; stairs(flip(x),flip(y),'-b') hold on stairs(x,y,'--r') legend('Backward','Normal') y...

3 jours il y a | 0

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Calling a specific value from a matrix using a loop
vals = [5 15 30 50]; idx = ismember(att_power(:,1),vals); result = att_power(idx,2)

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Accessing variable in a table, depending on another variable
% Create a table: is_node = false(12); is_node(2,2) = true; is_node(4,2) = true; is_node(6,2) = true; is_node(10,2) = true;...

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How do I substract like variables from each other
a = readmatrix("Book1.xlsx"); b = datetime(a(:,2),'ConvertFrom','excel'); N = size(a,1); c = duration(NaN(N,3)); for i = 1:N...

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I get this error, ive already checked parenthesis.Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error.
There is a comma missing: f = figure ('position', [0, 0] scrz(3),scrz(4)); % ^^ missing a comma ...

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Need help to plot frequency axis should be linear and cover the range 10 to 110 Hz in 1 Hz steps. Your vertical axis should cover from 0 to -40 dB
% File name: ee310 project.m clear all; close all; %Specify components. Rs=1000; C1=11.65e-6; C2=250.1e-9; C3=28.13e-6;...

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reshape matrix with diffrent size
load('vecteur.mat') % stored vecteur in a mat file, to avoid defining it in the code again here SI = scatteredInterpolant(vec...

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Shift elements in a 3D array
Here's an example with a 2x3x2 array, removing all the 9s and appending 0s: data = reshape(1:12,[2 3 2]) siz = size(data); id...

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Which rows of a 2-column array contain elements of 1-column array.
ismember returns linear indices as its second output. You can use ind2sub to convert to row + column indices. a = [ 6208 ...

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Matlab menu sum values
clc msg = "Vyber hodnotu: "; vyber = ["-10000" "3000" "15000" "4000" "-6000"]; n = input("Počet pohybů na účtu: "); choice =...

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How to change scaling for different ranges of X-Axis inn figures?
Use set(gca(),'XScale','log') or semilogx.

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How to plot a function F(a,b) having a matrix F (axb)
surf(phi,sigmap,syy)

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How can I change all numbers in matrix to 1? except for 0
One way: M = randi(4,[5 5])-2 % a matrix with zero and non-zero elements M(M ~= 0) = 1 % replace non-zero elements with ones ...

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Working with a cell of strings
Use string or cellstr. C = {"one";"two"} string(C) cellstr(C)

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Element-wise set operations
C = A == B.';

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Finite Element: Filling nxm matrix by extracting values from another nx1 matrix
V(2:5,2:5) = reshape(W,4,[]).';

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Finding slope for the polyfit line
polyfit returns the coefficients in a vector, with the highest-degree coefficient first. Therefore, the slopes are the values of...

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plotting 12 graphs in one figure
load data_matrix.mat data=SECTION_L; data(:,1:3)=[]; row=9; cleanup=data([1 2 3 row],:); % year range y1 = 1975; y2 = 201...

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how to create a new variable based off an if else statement on one variable?
t = table(["cats";"dogs";"cats";"sheep"],'VariableNames',"animals") all_animals = ["dogs" "cats" "sheep"]; [~,idx] = ismembe...

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Can I use colormap to set color of my cumulative area chart in area()?
area dioesn''t use the figure's colormap directly, but it does use the axes' ''ColorOrder' by default, so maybe something like t...

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extract values from a table
It looks like, basically row 1 is year, row 2 is month, row 3 is day of month, and row 4 through the end are temperature data fo...

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indeHow to index values from a cell array
data =readtable('EURUSD=X.csv'); disp(data) G = floor((0:height(data)-1)/20).' + 1; DataE20 = splitapply(@(Date,Open,High,Low...

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how to use "randi" in specific case?
Maybe something like this (the example A requires at least 5 values, e.g., [10 15 20 25 30]): A = [ ... 0 0 1 0 0 0 0 0 0 ...

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How to make certain indexes of a cell array empty?
pixelBlock{by + 1, bx + 1} = [];

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How to initialize a table column to a character array?
% a table: filetext = table([1;2;3;4;5;6]) % append a column of all 'MET' on the right: filetext{:,end+1} = 'MET'

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Custom heat maps- How to highlight a specific value in the heatmap
Maybe one of the following two approaches will be useful, depending on exactly what you want to see. First, make up some data: ...

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