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for loop increment problem
clc clear % first we should note that this is a log-log plot % Let's introduce k first k = logspace(0, 4, 100)'; %connectivi...

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Colour code to find how big a function is
x = linspace(-1,1) ; y = linspace(-1,1) ; [X,Y] = meshgrid(x,y) ; F = (Y-X)./(1+X.^2) ; surf(X,Y,F)

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I wanted to import csv files in a specific folder and wanted to plot graphs of them from the data of secound column and third column in the file can you please help me
thepath = 'D:\APDL\Cylinder\CSV Files\'; files = dir([thepath,'\*.csv']) N = length(files) ; for i = 1:N fi...

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Have latex (bold) and variable in legend of a figure
plot(rand(1,10)) ; hold on plot(rand(1,10)) ; legend( 'Error','$[\frac{tv_p}{r_{well}}](\Pi_1=)$','Interpreter','latex', ...

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how to merge centroids?
You have the coordinates of centroid, you can use knnsearch to get the nearest neighbors.

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How to make Motor Power Loss Map from efficiency map ?
load('Motor_Map.mat') ; figure h1 = pcolor(Motor_RPM,Motor_Trq,Eff') ; % Plot Motor Efficiency Map h1.EdgeColor = 'none' ; ...

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In a 6x6 square matrix A, how to select elements in i-th row with A(i,j) ruled out
A = [0 0 -1 1 1 1 0 0 0 0 1 0 1 -1 0 1] ; B = zeros(size(A)...

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How to replace duplicate element to 0 in matrix for every rows
A = [1 1 1 2 2 2 3 3 4 4 5 5 5 1 2 2 3 3 3 4 4 4 5 5 6 6 1 1 1 1 2 2 3 4 5 5 5 6 6] ; B = zeros(size(A)) ; for i = 1:size...

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save index of find- loop in a table
C = cell(143,1) ; for i=1:143 [row,col]=find(HQ10000_WH(i,[1:10498])>0,1,'first') C{i} = col ; end

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Order Points for plotting
load('A.mat') ; x = A(:,1) ; y = A(:,2) ; n = length(x) ; iwant = zeros(n,2) ; i = 1 ; iwant(i,:) = [x(i) y(i)] ; x(...

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How to plot a stem 3d plot with base map
REad about stem3, plot, legend

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Why wont my loop populate pre-allocated matrix?
clc clear all close all syms V Z T=[277.15 287.15 297.15 307.15 317.15 327.15 337.15 347.15 357.15 367.15 381.15 401.15 421....

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3 vector to surface 3d plot?
Refer this link: https://in.mathworks.com/matlabcentral/answers/412639-creating-surface-plot-from-a-matrix-with-3-columns?s_tid=...

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Divide a column of a datafile through a constant value
txtFiles = dir('*.txt') ; % you are in the folder of text files N = length(txtFiles) ; % total files % loop for each file ...

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how to use quiver3 plot vectors at zero points(i want to set the start point of the vectors all at zero points)
Simple, make x,y,z matrices as zeros matrix. [x,y,z]=meshgrid(-3:1:3,-3:1:3,-3:1:3); dx=x; dy=y; dz=z; r=(dx.^2+dy.^2+dz.^...

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How to perform the following operation ( M(:,c)=M(:,c)+thr*M(:,c).*(N*2-1); )in each column in matrix M?
thr=.05 ; M = rand(14,128) ; N = rand(14,1) ; for c=1:128 M(:,c) = M(:,c)+thr*M(:,c).*(N*2-1); end

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find data with same name
You can get the deaths of each country using: T1 = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/100...

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how to use read variable
T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1005205/Population_data.xlsx') ; T.Population_mill...

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Multiple color bar graph in Matlab
x=[1 2 3] ; y=[10 20 30] ; c = {'r','g','b'} ; figure hold on for i = 1:3 bar(x(i),y(i),c{i}) end

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plotting a 2D truss
Refer this: https://in.mathworks.com/matlabcentral/fileexchange/86548-matlab-truss-finite-element-analysis If not attach your ...

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Index in position 2 exceeds array bounds. Index must not exceed 1. Error in FYP2 (line 154) h = plot (f ,Range(:,c));
Your RANGE is a array of size 991x1 and you are trying to extract more number of elements from it. May be you need to replace Ra...

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Addition of two different sized arrays
You may resize them to same size using imresize.

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How to calculate differential equation with trigonometric function?
f = @(x,y) -1./((2./y).*x+x.^2*y.^2.*cos(y)) ; xspan = [0.1 2] ; x0 = 1 ; [x,y] = ode45(f, xspan, x0); plot(x,y)

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Use a for-loop for multiply colums of two arrays
A = rand(4,8) ; B = rand(4,1) ; iwant = A.*B ;

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Three columns (x,y,z) in table, Loop through table for each X plot Y vs Z
Let data be your three column matrix. x = data(:,1) ; y = data(:,2) ; z = data(:,3) ; xi = unique(x) ; yi = unique(y)...

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How to interpolate pressure
load('matlab_Pressure.mat') L = linspace(5,700,length(PP)) ; Li = min(L):max(L) ; PPi = interp1(L,PP,Li) ; plot(L,PP,'....

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Using arrays, x and y coordinates, to calculate values for each pair of x and y
What I can understand is, you can make use of knnsearch, rangesearch

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What does .Metric do?
These lines: matchedPoints1 = valid_points1(indexPairs(:,1),:); matchedPoints2 = valid_points2(indexPairs(:,2),:); The result...

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Selecting data points from a plot
A rough idea would be to use boundary.

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Image file saving location
thepath = 'C:\Users\leehj\Desktop\aaa\' ; for i = 1:5 h = imagesc(X, Y, Z(:,:,i)); xlim([-2 2]); ylim([-1 1]); fnam...

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