Answered

Unrecognized function or variable 'X'.

fun = @(x,y) exp(-2*x.^4+2*x.^2-x.*y.^1-y.^2) ; fsurf(fun)

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 ...

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

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...

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...

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...

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

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.

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

Answered

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...

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...

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...

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

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 ...

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); ...

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,:)

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...

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

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...

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(...

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. ...

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

Answered

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...

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...

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...

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...

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

| accepted

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]

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);

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...

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...

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