Answered
Unrecognized function or variable 'X'.
fun = @(x,y) exp(-2*x.^4+2*x.^2-x.*y.^1-y.^2) ; fsurf(fun)

13 días ago | 0

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Answered
reshaping data properly mesh grid
Let X be your data matrix of size 2000*4. h = X(:,2) ; w = X(:,3) ; nh = length(unique(h)) ; nw = length(unique(w)) ; h ...

13 días ago | 1

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Answered
how to Search the documentation to create a 5-by-7 matrix with normally distributed numbers (instead of uniformly distributed numbers).
Read about randn. https://in.mathworks.com/help/matlab/ref/randn.html

13 días ago | 0

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Answered
how to code a discrete signal
You need to have array x and initial value of y in hand first. Example: x = rand(100,1) ; y0 = rand ; n = length(x) ; y...

13 días ago | 1

Answered
Unrecognized function errors MATLAB
To compare two strings use strcmp. Read about it. prompt = ["input wet or dry:","What value do you want to find [time/thicknes...

13 días ago | 0

Answered
How to count the amount of markers in a figure?
x = rand(1, 10000); y = rand(1, 10000); minAllowableDistance = 0.05; numberOfPoints = 50; % Initialize first point. keeperX...

13 días ago | 0

Answered
How to Terminate a Loop After Reaching the Desired Value?
tol = 10^-5 ; % fix your tolerance value while abs(r(n+1)-r(n))>tol r(n+1)=L*r(n) end

13 días ago | 1

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Answered
First 10 Harmonics of Fundamental Frequencies of FFT plot
Use the function findpeaks. Have a look on the function max, sort.

13 días ago | 0

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why does the command window show 'Unrecognized function or variable 'beta_est'.'? how to solve it?
Replace the line: syms bets_est; with syms beta_est; By the way you need not to use syms. You can straight away solve usin...

13 días ago | 0

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Answered
Label circles from imfindcircles
load centers.mat ; x = centers(:,1) ; y = centers(:,2) ; plot(x,y,'.r'); [x1,ii]= sort(x); y1 = y(ii); hold on...

14 días ago | 0

Answered
equalizing few matrices size in a cell
% demo data C{1} = rand(60000,1) ; C{2} = rand(65478,1) ; C{3} = rand(74578,1) ; % lengths of each cell array L = cell...

14 días ago | 0

Answered
Export time series data as csv
Read about writetable

14 días ago | 0

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Save To Excel in different columns
writetable(A,'test.xlsx')

14 días ago | 0

Answered
how to apply threshold in this 8x8 numeric matrix?
A = [3 148 117 148 145 178 132 174 2 176 174 110 185 155 118 165 0 100 124 113 ...

14 días ago | 0

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Answered
Draw curves in matlab
txtfiles = dir('*.txt') ; N = lewngth(txtfiles) ; for i = 1:N load(txtfiles(i).name) ; wave=Book1(:,1); ...

14 días ago | 0

Answered
The Goldbach Conjecture states that every positive even integer can be written as the sum of two primes
a=28 ; primenos = primes(a) ; b = nchoosek(primenos,2) ; idx = sum(b,2)==a ; iwant = b(idx,:)

14 días ago | 0

Answered
dvide 500 random color to 80 different basket
N = 100 ; R = ones(N,1) ; B = 2*ones(N,1) ; Y = 3*ones(N,1) ; G = 4*ones(N,1) ; P = 5*ones(N,1) ; balls = [R; B; Y...

14 días ago | 1

Answered
Error using plot. simple code error please help!!
You should use function step. step(G) Refer: https://in.mathworks.com/help/control/ug/plotting-system-responses.html

14 días ago | 0

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Answered
How to read netCDF file ?
I will recommend you to use this file exchange function: https://in.mathworks.com/matlabcentral/fileexchange/46669-gebconetcdf...

14 días ago | 0

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Answered
How to extract the data (y-axis) for a given value ( x-value)?
load('IDA_Plot_CLUSTER_UPDATED.mat') PGA_Scale = [0.1:0.1:5]; figure(1) % to plot figure B % for tt = 1:60 % plot(MIDR(...

14 días ago | 0

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Answered
How to set different colors for branches when making 3d tree structure plotting from excel columns?
You need to use plot3 with the segments by mentining different colors. You need to use hold on. To name the segments, use text. ...

14 días ago | 0

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image selection in an interface
Read about imcrop and imfreehand.

14 días ago | 0

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Calculating the point of rotation for a 2D line from frame 1 to 3
The center of rotation will be the point of intersection of perpendicular bisectors. So, you need to find the perpendicular bise...

14 días ago | 0

Answered
graph not plotting anything
You need to use element by element by division i.e. ./ in the formula. theta = linspace(0,2*pi, 1000); d2b = -(a*cos(theta)*c...

15 días ago | 0

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Answered
Show Coastlines on Maps
Download the bathymetry data from this link: https://www.gebco.net/data_and_products/gridded_bathymetry_data/ to your required d...

15 días ago | 0

Answered
Extracting sequential values from a matrix taking into account two filter criteria
Symbol_Thres = 77.3500 ; Matrix = [0 1 0 1 0 1 0 1 0 1 0 1 0 1 0...

15 días ago | 1

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Answered
Using unique-function - show amount of times unique value was found
REad about hist. xbins = unique(Location); [counts,centres] = hist(Location,xbins); R = [centres counts]

15 días ago | 2

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Answered
Why this code gives error?
Use: plot(f,20*log10(FFT_abs/max(FFT_abs)),'color','b','linewidth',3);

15 días ago | 0

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Answered
Intersection between a 3D grid and flight path.
Read about knnsearch. flightPath = [-28.0206900000000,153.379210000000,12300; -28.0196195409287,153.378420816824,12275.04...

15 días ago | 0

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...

15 días ago | 0

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