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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", ...

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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...

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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)

17일 전 | 0

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Combining Rows of a Table based on Matching first column entry?
Tcell ={'Air Force' 2011 13 7 6 'Akron' 2011 12 1 11 'Alabama...

17일 전 | 0

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3d plots with multi inputs
There are may ways of volume visualization. Check the document site: https://www.mathworks.com/help/matlab/volume-visualization...

17일 전 | 0

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Warning: Matrix is singular to working precision
Make sure your matrix "a" is full rank (rank(a) should be 6 instead of 5). a=[1, 0, 0, 0, -0.25, 0; 0, 1, 0, -0.25, 0, -0.25; 1...

17일 전 | 0

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plot the surface using ezsurf for the surfaces 𝑧1 = 𝑥cos (𝑦), 𝑧2 = 𝑦𝑒^( 𝑥 2−5) and label the axes.
ezsurf(@(x, y) x .* cos(y)) % Leave the next one for you to try

19일 전 | 0

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Making a look-up table periodic
theta = (-180:180); x = randn(size(theta)); % Look up table/interpolant F = griddedInterpolant(theta, x); % wrap the input...

19일 전 | 0

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Is it possible to concatenate columns of a tensor into a single column?
A =randn(10,1,10); B = A(:)

19일 전 | 0

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"find" is not finding what I want it to?
Try the following: AI=find(3.0<areas & areas<200); % AE=find(3.0>areas & areas<200); AE=find(3.0>areas | areas<200);

19일 전 | 0

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Bar width according to a duration type data in a bar graph
x = 1:10; % x data y = randi(10, size(x)); % y data w = rand(size(x))/2; % width for i =1 : nume...

19일 전 | 0

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How to factor symbolic equations
syms c SE1=c^2-2*c+1; SQ1=SE1==25; % you can factor a symbolic function but not an equation factor(SE1) factor(SE1-25)

20일 전 | 2

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Error while reading image in loop to perform some operation on all images in folder
function recursiveFile() % Files=dir('D:\datasets\PRImA_LayoutAnalysisDataset\PRImA Layout Analysis Dataset\Images\*.tif'); fo...

21일 전 | 0

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How to plot multiple audio files horizontally in MATLAB
n = 1000; t = (0:n-1)'*.0001; x = randn(n, 6); % 1000 samples 6 channels y = 0.2*x + (1:6); % scale the x by 0.2,...

21일 전 | 0

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what to do when i get unrecognized function or variable
You need to define the function y(t). y = @(t) cos(t); % eg. y(t) = cos(t) tmin=-3;tmax=5;dt=0.02; t=tmin:dt:tmax; y...

21일 전 | 0

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interpreting frequency vs phase plot in fft
The output of the FFT has zero values in most frequency bins(with some leaking effect due to the fact that frequencies of sinoso...

21일 전 | 0

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How to change the color of singular bars on a bar graph if the value is below the lower limit of the error bar?
weeks = [12:24] weight = [0.128125 0.16125 0.205 0.258125 0.321875 0.39875 0.491875 0.601875 0.73 0.879375 0.948125 1.1 1.32];...

21일 전 | 0

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(Important )How to generate numbers in matlab? Need help.
You can generate 2 random numbers in the given range and sort these 2 numbers out. img1 = imread('peppers.png'); data=5; %100;...

21일 전 | 0

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Why do upsample and downsample commands give wrong results in start of sequence?
All time axes start from 0. % Up/Down Sampler clear all close all clc x=[1 2 3 4]; % Input Sequence y=upsample(x,3); % Ups...

22일 전 | 0

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Plotting ellipses with parametric curves
% First ellipse t = linspace(0,2*pi,200); a = sqrt(2); b = sqrt(2/3); x = a.*cos(t); y = b.*sin(t); %plot(((1/2)*(x.^2)), ...

22일 전 | 1

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How to convert Data from 'yyyyMMddhhmm' format to datetime format
dstr = ["202201010000.000" "202301010000.000"] t = datetime(dstr,'InputFormat','yyyyMMddHHmm.SSS')

22일 전 | 0

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how to smooth the corners of a map
You can interpolate the data first before using contourf. For example, you can use scatteredInterpolant (with method "natural) ...

22일 전 | 0

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Deleting certain elements from an array without looping
fileNames = {'ThisIsADummyFile', '012345678901234567891'} idx = cellfun(@(x) length(x)~=21, fileNames) fileNames(idx) =[]

23일 전 | 0

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How to find pythagorean triangle's hypotenuse in a matrix?
a = [5 8 12 3; 8 12 63 20; 9 84 144 20; 24 11 15 180]; b = [12 6 5 4; 15 35 16 21; 40 13 17 99; 7 60 112 19]; c = sqrt(a.^2 + ...

23일 전 | 0

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How can I make an animation out of contourf plots?
figure for t=10:10:100 % t is the percent number in the file name subplot(121) fn = "T_timestep_"+t"_precent"; ...

23일 전 | 0

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plot half Wave rectied sindus
t=0:0.01:1; y=10*sin(8*pi*t); y(y<0) = 0; plot(t, y)

23일 전 | 1

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Does intlinprog find a local minimum or global minimum?
MILP is NP-hard problem. All solvers require some heuristic rules and the global optimum can not guarenteed for larger problems...

23일 전 | 1

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hw 2 solve this
y = (cosd(35) - secd(35)^2)/tand(70)

23일 전 | 0

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How can I plot 'period' by using fft functoin??
Fs = 1000; % Sampling frequency T = 1/Fs; % Sampling period L = 1500; ...

23일 전 | 0

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envelope rms implementation review
"envelope" removes the mean first before doing movrms and it restore the mean offset in the end. If you nake sure the signal is...

23일 전 | 0

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