Answered
Draw Circle on picture and then save the drawn circle on the picture
Image = imread('peppers.png'); imshow(Image) % plot circle hold on th = 0:pi/50:2*pi; R = 50 ; C = round([size(Image,2...

5 years ago | 0

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Error using imwrite with variable filename in for loop
Replace the line: imwrite(img,[i,'.png']); with imwrite(img,[num2str(i),'.png']);

5 years ago | 1

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Answered
Meshgrid for 3 variables
Read about surf.

5 years ago | 1

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Answered
removing words from texts with 'removeWords' ???
str1 = 'Hello world, how are you?' ; str2 = 'how are you?' ; str=setdiff(strsplit(str1),strsplit(str2))

5 years ago | 0

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Find the position of the first non-zero value in a matrix
A = rand(10) ; idx = randperm(10*10,80); A(idx) = 0 ; iwant = zeros(1,10) ; for i = 1:10 iwant(i) = find(A(:,i),1) ...

5 years ago | 0

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Answered
how to import 2gb txt file data into workspace?
Read bout textscan.

5 years ago | 0

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Error using * on matlab basic command
clc; clear ;close all v=0:0.1:100; % mlp y = 0.35; Amplitude = 0.35; Peroid = 12; Weight = 155.42; c = 40; k = 13.75; W...

5 years ago | 0

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Calculate output row by row (Data Grid)
Read about table.

5 years ago | 0

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Requires more input arguments to run
It looks like you are starught away running the function using run button or F5 key. This is not the way to call a function. S...

5 years ago | 1

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different excel file comparisons
T1 = readtable(file1) ; T2 = readtable(file2) ; idx = ismember(T1.names, T2.names)

5 years ago | 1

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insert markers to an image
Use imshow to show up a image. Use plot or scatter with given coordinates and required markers. Note that you need to use hold o...

5 years ago | 0

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How to plot a workspace
Let A be your workspace variable of size 26*2. x = A(:,1) ; y = A(:,2) ; plot(x,y) REad about the function plot.

5 years ago | 0

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Matlab error, Z must be a matrix, not a scalar or vecto
r= 5; theta= 60 ; ro=5; w1=200; w2=300; t=0:1:60; dt=diff(t); dt = unique(dt) ; x=ro*cos(w1.*t)+r.*cos(theta+(w1+w2...

5 years ago | 0

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Comparative Operator result is wrong
Note that you are comparing two floating point numbers and such numbers cannot be comapred using ==. Follow tol = 10^-5 ; idx...

5 years ago | 0

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Preallocating cells with unknown output size
You can try to initilize them as X = cell([],[]) ; You can check the timing using tic , toc.

5 years ago | 0

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Why is the graph linear instead of curve?
You have to increase the number of values in x, when calling the function. x=[0 8 16 25 37]; y=[5 17 12 21 19]; disp("Los da...

5 years ago | 0

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Output argument "output" (and maybe others) not assigned during call to
Check in your function/ file the output which you are seeking is not present. a = myfunc(2,3) ; function out = myfunc(b,c) ...

5 years ago | 1

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Array processing operation and summation
To achieve this you need to read about input and for loop. Use input and enter the value of N. Initialize the required sum ...

5 years ago | 0

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Extract data between thresholds
A = load('test.txt') ; A = A' ; ii = zeros(size(A)); jj = A > 0; ii(strfind([0,jj(:)'],[0 1])) = 1; idx = cumsum(ii).*jj; ...

5 years ago | 0

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Answered
Skipping a NaN in a loop
A = rand(5) ; % data for demo A(:,2) = NaN ; % replace a column with NaN for i = 1:5 if any(isnan(A(:,i))) ...

5 years ago | 0

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How can I add angular noise to my vector?
Read about rand. X = X+rand(size(X)) ;

5 years ago | 0

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How Can I solve this problem?
USe .^ instead of ^. H = 3; P = 100; ls = atan(P/H); fun = @(x) (2*(H/P)^2)*(x + (4/3)*x.^3 + (17/15)*x.^5 + (248/315)*x.^7...

5 years ago | 0

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Trying to save a Matlab file with a timestamp
for i = 1:10 data = rand(100,1) ; fname = strcat('projjectile',string(datetime('now','Format',"yyyy-MM-dd-HH-mm-ss"))...

5 years ago | 0

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Answered
Add xyz arrows in plot
% points x = rand(50,1) ; y = rand(50,1) ; z = rand(50,1) ; % vectors u = rand(50,1)/10 ; v = rand(50,1)/10 ; w = r...

5 years ago | 2

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Answered
How do I plot the equipotential lines in matlab?
L = 1 ; x = linspace(-0.5,+0.5) ; lambda = sin(pi*x/L) ; plot(x,lambda)

5 years ago | 0

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How to merge different data collected at different times?
Read all the files and save time of each file. Get the minimum and maximum of time out of the three files. Create date time a...

5 years ago | 0

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Unable to convert expression into double array
This line: subs(diff) You have to substitute some value right? I guess you need to input value of t here......

5 years ago | 0

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Machine learning for images dataset
If you have images to train the best you have imageDatastore. https://in.mathworks.com/help/matlab/ref/matlab.io.datastore.ima...

5 years ago | 0

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Take average of multiple matrices
load data.mat ; A = cat(3,phi_BFD_v_sum{:}) ; iwant = mean(A,3) ;

5 years ago | 1

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Plot data in map with LAT LONG
Refer this: https://www.eoas.ubc.ca/~rich/map.html You may see the below example for plotting. x = LON ; y = LAT ; z = power ...

5 years ago | 0