# 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**

If f1(x,y)≤z≤f2(x,y), how to draw the range of z?

x=-5:0.1:5; y=-5:0.1:5; [m,n] = meshgrid(x,y) ; z1 = m.^2+n.^2; z2 = 3*m.^3+n.^2+1 ; surf(x,y,z1,"EdgeColor","none")...

3 dagen ago | 0

Vectorize scalar and colon

A = zeros(6,10) ; A(:,1:3) = 1 ; A(4:6,4:5) = 1;

16 dagen ago | 0

Pearson correlation graph between variables

clc; clear ; R = zeros(6,1) ; for i = 1:6 X = rand(100,1) ; y = rand(100,1) ; R(i) = regression(X',y') ; ...

16 dagen ago | 0

how to plot from .csv file?

T=readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1753899/baseline.csv') ; freq=T.(2)(1:6); A_1_PE_H...

30 dagen ago | 0

Multiple text entries over plots

You can use the text to add the strings. You need to specify the position where you want to place the string. You may find centr...

ongeveer een maand ago | 1

| accepted

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...

ongeveer een maand 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 ...

ongeveer een maand ago | 0

copping grayscale image and remove any other borders or details

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

ongeveer een maand 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...

2 maanden 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...

2 maanden 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...

3 maanden ago | 0

| accepted

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...

4 maanden ago | 0

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

z = 3+eps*1i

5 maanden ago | 2

| accepted

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

Read about smooth, movmean.

5 maanden 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...

5 maanden 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...

5 maanden 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') ;...

5 maanden ago | 0

Extracting Histogram data for plot generation

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

5 maanden 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...

5 maanden 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)

5 maanden 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 ; ...

5 maanden 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(...

5 maanden 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...

5 maanden ago | 0

| accepted

Plot a time series plot in customized rectangle

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

6 maanden 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...

6 maanden 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)) ; ...

6 maanden 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. ...

6 maanden 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)+(...

7 maanden 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...

7 maanden 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...

8 maanden ago | 1

| accepted