# KSSV

https://sites.google.com/site/kolukulasivasrinivas/ Professional Interests: Mathematical Computing

**Programming Languages:**

Python, MATLAB, Fortran

**Spoken Languages:**

English, Hindi, Telugu

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**Feeds**

How to Extract photos at Each frame from a Video in MATLAB?

vidObj = VideoReader('C:\Users\Public\Videos\Sample Videos\Wildlife.wmv'); numFrames = 0; while hasFrame(vidObj) F = read...

1 day ago | 0

Interpolation of two-dimensional within a given space window

T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1744881/Points.txt'); x = T.(1) ; y = T.(2) ; z ...

2 days ago | 0

copping grayscale image and remove any other borders or details

Read about imcrop. [I,rect] = imcrop(myimage) ;

2 days ago | 0

Script has no errors, but no plot is given

% Constants hbar = 1.0545718e-34; % Planck's constant m = 9.10938356e-31; % Electron mass l = 1; % angular momentum quantum...

24 days ago | 0

| accepted

Index in position 1 is invalid. Array indices must be positive integers or logical values.

You need to proceed like this: tic % Specifying the length of the array N = 1000; % Making phi and theta array lengths th...

25 days ago | 0

| accepted

How to move colorbar in scatter3 plot and keep it inside the figure

You need to play with the position. cb.Position = [x y L w] ; The position have the details of position (x,y) of the colorbar...

2 months ago | 0

How do I plot a polynomial equation and set of x-y coordinates on the same graph?

x = [2 5 8 11 14 20]; y = [0.20 0.29 0.44 0.50 0.66 0.56]; p = polyfit(x,y,3) ; yi = polyval(p,x) ; figure hold on plo...

3 months ago | 0

How to make double array representation as complex array with null imaginary number ?

z = 3+eps*1i

3 months ago | 2

| accepted

How can I perform time averaging of a signal acquired with an accelerometer?

Read about smooth, movmean.

3 months ago | 1

Rearranging a vector into a matrix according to other two vectors

x = unique(lat) ; y = unique(depth) ; [X,Y] = meshgrid(x,y) ; F = scatteredInterpolant(lat,depth,concentration,'linear','n...

4 months ago | 1

how to store total numbers from for loop in variables

x = xlsread('grades.xlsx'); % Initialise all variables to zero fa = 0; pa = 0; cr = 0; di = 0; hd = 0; % Write your cod...

4 months ago | 1

Plot time-series data

Let A be your table. wavelength = A(:,1) ; Time = 1:size(A,2)-1 ; data = A(:,2:end) ; h = pcolor(wavelength,Time,data') ;...

4 months ago | 0

Extracting Histogram data for plot generation

h = histogram(rand(100,1)) data = h.Data ; BinEdges = h.BinEdges ; Values = h.Values ;

4 months ago | 0

Trying to find pi using when loops to a tolerance of 10^-4.

Try somewthing l;ike this: % summation of pi = 4 * (-1^(k+1))/(2*k-1) ; n_digits = 10 ; iteration = 0 ; % starting iteratio...

4 months ago | 0

hi how can i evaluate the function below from x=1,x=2 into a step of 0.1 y=x/(x2+1)

x = 1:0.1:2; % Define the range of x with a step of 0.1 y = x./(x.^2 + 1); % Evaluate the function plot(x,y)

4 months ago | 0

convert a .mat to excel file

matFiles = dir('*.mat') ; N = length(matFiles) ; T = table; for i =1:N load(matFiles(i).name) ; T.(i) = val ; ...

4 months ago | 0

Solving a system of Non Linear Differential Equations

This is the code..I am getting hight values...you may check and modify the code. tspan = [0 1]; y0 = [0 0 100]; sol = ode45(...

4 months ago | 0

Why does it give error in spectrogram plotting?

Replace data = @(filename)fullfile('D:\Rahul\Data_tokamak\data&plot\data_paper1\H-mode data\H-mode bistable model\set1_neoAno_r...

4 months ago | 0

| accepted

Plot a time series plot in customized rectangle

plot(time,pm_1,'b','LineWidth',1); % You may change line width

4 months ago | 1

Hi, I'd like to see the temperature on a surface map of lon (-20 20) and lat (-10 10).I'd like to have an idea so that this script gives me a better visual like on the figure?

You need to make the values lying outside the given scattered points to NaN. For outside values, the function will extrapolate w...

4 months ago | 0

| accepted

fsurf(sym(1), [0 1 0 1], 'y', 'EdgeColor', 'none'), this is fun for z axis , how about y axis?

What you gave is similiar to: x = linspace(0,1,35) ; y = linspace(0,1,35) ; [X,Y] = meshgrid(x,y) ; Z = ones(size(X)) ; ...

4 months ago | 1

Using the clear command in functions?

Becuase clc, clear clears your input variables which are saved in the workspace. You need not to use it inside the function. ...

5 months ago | 1

Error using surf Z must be a matrix, not a scalar or vector.

You have to use X and Y i.e matrix in the calculation Z. x=(0:0.1:pi); y=(0:0.1:pi); [X, Y]= meshgrid(x,y); Z=(sin(0.3*X)+(...

5 months ago | 0

| accepted

How to fill/interpolate missing data to nearest geospatial coordinate?

% Prepare dummy data [X,Y] = meshgrid(1:10,1:10) ; Z = rand(size(X)) ; % Make random nan's idx = sort(randsample(numel(X...

6 months ago | 0

Loading a .fig file in MATLAB without losing information

h1 = openfig('test1.fig','reuse'); % open existing/ saved figure ax1 = gca; % get handle to axes of figure h2 = figure; % cr...

6 months ago | 1

| accepted

How to get the plot x&y when a user clicks on a point I have plotted

REad about getpts

7 months ago | 0

I wonder how to make the lines thicker in rlocus graph

sys = tf([2 5 1],[1 2 3]); rlocus(sys) set(findall(gca, 'Type', 'Line'),'LineWidth',5);

7 months ago | 0

How to get output of multiple variables in xls

Let the variables be x, y, z. T = table(x,y,z) ; writetable(T,'text.xlsx')

7 months ago | 0

FE triangle mesh without the mesh node connections visible

h1 = trisurf(meshConnections, X, Y, Z, permittivity); h1.EdgeColor = 'none' ;

8 months ago | 0

| accepted

Searching a string on a table to get time

You may try using functions like contains, strcmp T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/...

8 months ago | 0