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Comparing elements of two uneven lists of numbers
a1=[ 15 420 5778 6018 6388 ]; a2 = [ 414 1430 5762 6384 ...

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How to check a matrix is multibanded?
% Create a banded sparse matrix B = bucky; r = symrcm(B) a=B(r,r); imagesc(a); % Check if it is banded m = size(a,1); ...

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How to get the aircraft location from a flight path plot?
% Generate some data t = (7020:210:10080)'; lon = 102.915 - t/10080; lat = 1.363 - t/20000; heading = 153 + t/50040; % Cr...

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How do I use a user input string to reference a structure that already exists?
Here is one solution without dynamically naming a variable: ... UserInput='ExistingStructure'; if exist(userInput, 'var') ...

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Group values of a vector into new vectors according to magnitude
A = [17 323 100 3 278 220 45 351 212 51] B = A(A>=0 & A<50) C= A(A>=50 & A<100) % Leave D for you

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generating random numbers only 2 numbers
a = randi([0 1], [1 30])*3 + 1

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How to get the file names that start with the same letter in the folder?
fn = dir('T*.*') % you can use 'T*.T', 'T15*.bin', etc

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How to connect dots in figure?
% data x = randn(50, 6)*.5+(1:6); % 6 lines, 50 data points each line % if you really want to plot 50 lines, then: plot(x') ...

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combine different size vectors into one matrix
% use a cell array instead of separate variables e{1}=[2 3 4 5]; e{2}=[4 7 7]; e{3}=[8 8 7 4 2 5]; % find the longest vect...

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Matlab 3D bar plot
xyz=[... 6.50319529000000 10 5 6.50463629000000 10 10 6.50548840000000 10 15 6.50607061000000 ...

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How to combine and transpose arrays?
s1 = rand(5,1); s2 = rand(5,1); s3 = rand(5,1); s4 = rand(5,1); imp =[s1 s2 s3 s4]' % or imp1 = cat(2, s1, s2, s3, s4)' ...

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I need to read third coloumn and all rows of text file in matlab. Pls give your suggestions.
You can read all data (xyz.txt contains first part of your data). Then it is up to you to use which column of data. data = rea...

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How do I switch location of the largest and smallest elements of an array?
vect = randi(20,1,15) [~, imax] = max(vect) [~, imin] = min(vect) % swap tmp = vect(imax); vect(imax) = vect(imin); vect...

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Only graphing two out of three of my graphs
ch0 = ex32excel(:,2); ch1 = ex32excel(:,4); N = length(ch0); deltast = 2e-5; t1 = 0:deltast:deltast*(N-1); xlow=0.02394;...

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solving for complex numbers
A = 3+4j B = 3 -2j C = 2*exp(1j*deg2rad(50)) % Find out D yourself

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How to plot several signals in 3D
t = 0 : 10e-5 : 2e-2; y1 = sin(2*pi*50*t); y2 = sin(2*pi*100*t); f = [0 2 4]; plot3(t, f(1)*ones(size(t)), y1); hold on p...

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How can I plot the graph?
x = 0:100; plot(x,carFunc(x)); ylim([0 30]) function output = carFunc(x) output = zeros(size(x)); idx = (x >= 75...

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How to downsample a vector x by an integer factor M with a single statement such as for loop or conditional statements
a = 1:10; b = downsample(a, 3) % use downsample c = a(1:3:end) % statement

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Why is MATLAB producing the wrong output with this function?
beamLoc = [10 200 300] b = FindDeflection((beamLoc)) function [beamDef] = FindDeflection(beamLoc) A = (1/3.19e9); beamDef = ...

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print numbers to command window
With mapping toolbox, you can use angl2str. doc angl2str for more details. A = 0; B = 206.4188; C = -130.5507; A1 = angl...

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Problem obtaining minimum negative value in an array
t = linspace(0,15,400); y = exp(-0.5*t).*cos(2*pi.*t); plot_cos(t, y) % plot t-y or y-t? function m = plot_cos(t, y) plot(y...

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display functions and coefficients from the basic fit tool box on a plot
xy = [3.25 0.801369; 3.375 0.883622]; x = xy(:, 1); y = xy(:, 2); f1 = @(x) 0.6580*x-1.337209; f2 = @(x) 0.0632*...

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display functions and coefficients from the basic fit tool box on a plot
Use your own fitting function: % Some data x = 0:.1:10; y = x.^2 +2*x + 3 +randn(size(x))*.4; plot(x, y) % fitting (polyf...

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Can MATLAB recognized the name of a variable with input function?
It's possible but it should be avoided if possible. milk = 30; %x = input('what is the name of the object? ', 's') % use this...

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How to change yellow fill to white in 'mapshow'
p = shaperead('concord_hydro_area.shp'); mapshow(p, 'FaceColor', 'y') % change 'y' to 'w' for white

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a problem with transpose of Symbolic matrix
The bar over the variable means complex conjugate. ' means complex conjugate transpose, while traspose or .' means transpose wi...

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fill missing point in data (x y z 3 columns data)
% Generate some data [x, y] = meshgrid(1:60, 1:50); x = x(:); y = y(:); z = 1./((x-30).^2+(y-20).^2); % make a square ho...

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How to Cell indexing
X1=11; X2=22; u{1}=[X1,X2]; u{1} % To access "one" element u{1}(1) u{1}(2)

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How can I have proper alignment in my output?
Try something like this to align the text: fprintf('%-30s', 'Numeric Daily Averages:'); fprintf('%10.2f ', rand(1,4)); fprintf(...

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Indexing by using column names
A = zeros(3,1); B=rand(3,1); C=ones(3,1); T = table(A, B, C) VarNames = {'A', 'C'}; col_index = ismember(T.Properties.Variabl...

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