https://sites.google.com/site/kolukulasivasrinivas/

Professional Interests: Mathematical Computing

Answered

i want to calculate the mean of all the images that are present in my folder. I have written the code for calculating the mean of 1 image . I want the mean of all the images that are present in my folder

imgFiles = dir('*.jpg') ; % get ll images in the folder N = length(imgFiles) ; % Total number of images % loop for each ...

i want to calculate the mean of all the images that are present in my folder. I have written the code for calculating the mean of 1 image . I want the mean of all the images that are present in my folder

imgFiles = dir('*.jpg') ; % get ll images in the folder N = length(imgFiles) ; % Total number of images % loop for each ...

1 día ago | 0

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Answered

Plotting a graph row by row from a table

Pick the data into a matrix from table. You can either use table2array, table2cell. Let A be your m*n matrix. plot(A') legend...

Plotting a graph row by row from a table

Pick the data into a matrix from table. You can either use table2array, table2cell. Let A be your m*n matrix. plot(A') legend...

2 días ago | 0

Answered

How do i combine the stiffness matrix for a rectangular mesh with 100 elements.?

Refer: https://in.mathworks.com/matlabcentral/fileexchange/32029-plate-bending https://in.mathworks.com/matlabcentral/fileexcha...

How do i combine the stiffness matrix for a rectangular mesh with 100 elements.?

Refer: https://in.mathworks.com/matlabcentral/fileexchange/32029-plate-bending https://in.mathworks.com/matlabcentral/fileexcha...

2 días ago | 0

Answered

create from a vector a vector of cumulative sums

Read about cumsum. A = rand(10,1) ; iwant = cumsum(A)

create from a vector a vector of cumulative sums

Read about cumsum. A = rand(10,1) ; iwant = cumsum(A)

2 días ago | 0

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Answered

1D Shallow Water Equations Dam Break

https://in.mathworks.com/matlabcentral/fileexchange/46475-1d-shallow-water-equations-dam-break?focused=3818450&tab=function

1D Shallow Water Equations Dam Break

https://in.mathworks.com/matlabcentral/fileexchange/46475-1d-shallow-water-equations-dam-break?focused=3818450&tab=function

2 días ago | 0

Answered

How to sum average annual data

Convert your date time into d,m,y, using datevec. Pick a year you want, get it's indices and use mean. Let A be your data. [y,...

How to sum average annual data

Convert your date time into d,m,y, using datevec. Pick a year you want, get it's indices and use mean. Let A be your data. [y,...

2 días ago | 0

Answered

how to extract last 3 bits from binary string and then concatenate

iwant = Y1(:,8:10)

how to extract last 3 bits from binary string and then concatenate

iwant = Y1(:,8:10)

2 días ago | 0

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Answered

Extend a line of best fit

You have used polyfit, so you have slope and y-intercept in your hand. For a given value of x, you can find respective y value u...

Extend a line of best fit

You have used polyfit, so you have slope and y-intercept in your hand. For a given value of x, you can find respective y value u...

2 días ago | 0

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Answered

using meshgrid data in a matrix

YOu should modify these lines: eps1=0:0.01:2; eps2=0:0.01:2; [e1,e2]=meshgrid(eps1,eps2); I hope that g_k, f_k are of same ...

using meshgrid data in a matrix

YOu should modify these lines: eps1=0:0.01:2; eps2=0:0.01:2; [e1,e2]=meshgrid(eps1,eps2); I hope that g_k, f_k are of same ...

2 días ago | 0

Answered

How to extract the the right X,Y,Z value for obtaining the best contour plot similar than the complete contour

Option 1: load("A.mat") ; x = A(:,1); y = A(:,2); z = A(:,3); m = 21 ; n = 21 ; % can be changed xi = linspace(min(x),...

How to extract the the right X,Y,Z value for obtaining the best contour plot similar than the complete contour

Option 1: load("A.mat") ; x = A(:,1); y = A(:,2); z = A(:,3); m = 21 ; n = 21 ; % can be changed xi = linspace(min(x),...

2 días ago | 0

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Answered

Some technical issues of Laplace Numerical Equations

Replace this line: unkp1 = 0.25*(un(i+1,j)+un(i-1,j)+un(i,j+1)+un(i,j-1)); with unkp1(i,j) = 0.25*(un(i+1,j)+un(i-1,j)+un(i,j...

Some technical issues of Laplace Numerical Equations

Replace this line: unkp1 = 0.25*(un(i+1,j)+un(i-1,j)+un(i,j+1)+un(i,j-1)); with unkp1(i,j) = 0.25*(un(i+1,j)+un(i-1,j)+un(i,j...

2 días ago | 0

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Answered

Finding area UNDER two curves

Lets say you data is (x,y1) and (x,y2) which is of size m*2. Your curve for which you want area uses the minmum value of the two...

Finding area UNDER two curves

Lets say you data is (x,y1) and (x,y2) which is of size m*2. Your curve for which you want area uses the minmum value of the two...

2 días ago | 0

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Answered

help using fzero to find the intersection

Try this: https://in.mathworks.com/matlabcentral/fileexchange/22441-curve-intersections?focused=5165138&tab=function

help using fzero to find the intersection

Try this: https://in.mathworks.com/matlabcentral/fileexchange/22441-curve-intersections?focused=5165138&tab=function

2 días ago | 0

Answered

draw two plot in a graph

The plot looks like a regression plot read about plotregression. If you have two data points and want to plot them read about pl...

draw two plot in a graph

The plot looks like a regression plot read about plotregression. If you have two data points and want to plot them read about pl...

2 días ago | 0

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Answered

Sorting numbers according to elements of an array

SORTING = [3 7 11]'; input = 4.1; %code to compute which number it is closest to % output = 3; % GEt the absolute difference...

Sorting numbers according to elements of an array

SORTING = [3 7 11]'; input = 4.1; %code to compute which number it is closest to % output = 3; % GEt the absolute difference...

2 días ago | 1

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Answered

auto split matrix into other matrices (up to n)

A = [1 55 14 1 1 1 2 55 14 1 1 1 5 35 13 1 1 2 6 35 12 1 1 2 7 35 11 2 2 3 8 35 11 2 2 3]; C = A(:,end) ; [c,ia,ib] = ...

auto split matrix into other matrices (up to n)

A = [1 55 14 1 1 1 2 55 14 1 1 1 5 35 13 1 1 2 6 35 12 1 1 2 7 35 11 2 2 3 8 35 11 2 2 3]; C = A(:,end) ; [c,ia,ib] = ...

3 días ago | 0

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Answered

FZERO requires at least two input arguments

You have to provide inputs to the function. Save those functions in a file, in a folder. al = give your value ; bt = give y...

FZERO requires at least two input arguments

You have to provide inputs to the function. Save those functions in a file, in a folder. al = give your value ; bt = give y...

3 días ago | 1

Answered

How to split the data inside the matrix correctly?

Try this loop....I quicky typed it..check thorughly. data = [0 0 2.53164556962025 0 5.06329113924051 0 ...

How to split the data inside the matrix correctly?

Try this loop....I quicky typed it..check thorughly. data = [0 0 2.53164556962025 0 5.06329113924051 0 ...

3 días ago | 0

Answered

I want to plot the below equation in matlab but i dont know how to plot

Let the range of (x,y) be from 0 to 1 . m = 100 ; n = 100 ; x = linspace(0,1,m) ; y = linspace(0,1,n) ; [X,Y] = meshgrid(...

I want to plot the below equation in matlab but i dont know how to plot

Let the range of (x,y) be from 0 to 1 . m = 100 ; n = 100 ; x = linspace(0,1,m) ; y = linspace(0,1,n) ; [X,Y] = meshgrid(...

3 días ago | 0

Answered

Create a vector with binary values {0,1} with certain percentage of 0's and 1's

N = 10 ; % total numner of elements O = 6 ; % Number of 1 needed F = N-O ; % Number of 0 O = ones(1,O) ; F = zero...

Create a vector with binary values {0,1} with certain percentage of 0's and 1's

N = 10 ; % total numner of elements O = 6 ; % Number of 1 needed F = N-O ; % Number of 0 O = ones(1,O) ; F = zero...

3 días ago | 0

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Answered

saving images in loop

for i = 1: length(fwdposx) figure('color','w') drawfield(frateMaps{i},'jet',max(max(frateMaps{i}))); ...

saving images in loop

for i = 1: length(fwdposx) figure('color','w') drawfield(frateMaps{i},'jet',max(max(frateMaps{i}))); ...

3 días ago | 0

Answered

How I can show one plane of a 3D matrix double

To use imshow the input should be a matrix .....you may try imshow(squeeze(B))

How I can show one plane of a 3D matrix double

To use imshow the input should be a matrix .....you may try imshow(squeeze(B))

3 días ago | 0

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Answered

Conversion of a vector file into raster

Let x,y,z be your column data. xi = min(x):0.5:max(x) ; yi = min(y):0.5:max(y) ; [X,Y] = meshgrid(xi,yi) ; Z = griddata...

Conversion of a vector file into raster

Let x,y,z be your column data. xi = min(x):0.5:max(x) ; yi = min(y):0.5:max(y) ; [X,Y] = meshgrid(xi,yi) ; Z = griddata...

4 días ago | 0

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Answered

Help with Delaunay Triangulations plot

I suggest to use this package for Delaunay Triangulation. https://in.mathworks.com/matlabcentral/fileexchange/25555-mesh2d-del...

Help with Delaunay Triangulations plot

I suggest to use this package for Delaunay Triangulation. https://in.mathworks.com/matlabcentral/fileexchange/25555-mesh2d-del...

4 días ago | 0

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Answered

In a randomly generated matrix how to find the position(row and column) of an element by using its value?

Your matrix has floating point numbers..you cannot get the value you want using like that. You should use: tol = 10^-5 ; % tole...

In a randomly generated matrix how to find the position(row and column) of an element by using its value?

Your matrix has floating point numbers..you cannot get the value you want using like that. You should use: tol = 10^-5 ; % tole...

4 días ago | 1

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Answered

Eliminate certain entries of cell array

If C is your cell array and FR has the indices of cells which are to be removed, use: C(FR) = []

Eliminate certain entries of cell array

If C is your cell array and FR has the indices of cells which are to be removed, use: C(FR) = []

4 días ago | 0

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Answered

change color scheme of a scatter plot

You should follow like this demo: n = 100 ; x = 1:n ; y = rand(size(x)) ; % divide based on values idx1 = y >=0 & y<0.25 ;...

change color scheme of a scatter plot

You should follow like this demo: n = 100 ; x = 1:n ; y = rand(size(x)) ; % divide based on values idx1 = y >=0 & y<0.25 ;...

4 días ago | 1

Answered

How can I convert this cell array into a matrix?

Use reshape after that. iwant = reshape(cell2mat(C),60,[])' ;

How can I convert this cell array into a matrix?

Use reshape after that. iwant = reshape(cell2mat(C),60,[])' ;

4 días ago | 0

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Answered

regarding plotTING DATA in matlab

% Random data for demo n = 100 ; x = 1:n ; y = rand(size(x)) ; % plot plot(x,y) lgd = ['ymax = ',num2str(max(y))] ; leg...

regarding plotTING DATA in matlab

% Random data for demo n = 100 ; x = 1:n ; y = rand(size(x)) ; % plot plot(x,y) lgd = ['ymax = ',num2str(max(y))] ; leg...

4 días ago | 0