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KSSV


Last seen: Today Active since 2011

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

Programming Languages:
Python, MATLAB, Fortran
Spoken Languages:
English, Hindi, Telugu

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Answered
Read multiple CSV files from different folders uing readtable
thepaths = {p1,p2,p3} ; for i = 1:3 % loop for ech folder csvFiles = dir([thepaths{i},'\*csv']) ; % get ll csv files in ...

circa un'ora ago | 0

Answered
read many ncdata using ncread
ncfiles = dir('*.nc') ; N = length(ncfiles) ; for i = 1:N thisfile = ncfiles(i).name ; % do your calculation end...

3 giorni ago | 0

Answered
streamline function gives empty output
Try replacing NaN's in u, v with zero and use stream2.

3 giorni ago | 0

Answered
Graph appears blank but the equation and code are correct.
H_k_eq = @(k) (exp(-pi.*k.^2)) ./ (exp(-pi.*k.^2) + exp(-pi.*(4.*k).^2)); %<-- element by element division Range = -0.5:.01:...

3 giorni ago | 1

Answered
Solving Unknowns with Symbolic Toolbox
A = [1 1 0 0 ; 0 0 1 1 ; 1 0 1 0 ; 0 1 0 1] ; b = [3;7;4;6] ; x = pinv(A)*b Note that rank of A is 3, so...

3 giorni ago | 0

| accepted

Answered
Plotting a 3D matrix with plot3
LambdaL = linspace(0.000001,0.0001,20); % [Matrix in X axis] LambdaT = linspace(0.000001,0.0001,20); % [Matrix in Y axis] ...

4 giorni ago | 0

Answered
Write a program to input 3 integer digits (from 100 - 999), then in the numbers letters in hundreds, tens, and units ?
Read about input and see this file exchange: https://in.mathworks.com/matlabcentral/fileexchange/47221-number-to-words

5 giorni ago | 0

Answered
How to Plot Excel file in MatLab
Load the excel file into MATLAB using readtable. If you have time series; use plot. If 2D use pcolor. If scattered data use scat...

5 giorni ago | 0

Answered
Multiple data file loading to run some functions
fname = dir('*.txt') ; % gets all text files N = length(fname) ; for i = 1:N txtFile = fname(i).name ; % load t...

5 giorni ago | 0

| accepted

Answered
Gradient of a Vector function
syms x y z f(x,y,z) = x+y^3 ; gradient(f)

5 giorni ago | 0

Answered
Rotating X & Y Data
p1 = rand(2,1) ; p2 = rand(2,1) ; %%rotation matrix th = 90*pi/180 ; R = [cos(th) -sin(th) ;sin(th) cos(th)] ; %%rotate po...

6 giorni ago | 0

Answered
Finding equilibrium points for an ODE system
tol = 10^-5 ; % change the tolerance idx = abs(cdot)<tol & abs(cddot)<tol ; [cdot(idx) cddot(idx)]

6 giorni ago | 0

Answered
Hello I'm getting this warning "Variable 'x1' might be set by a nonscaler operator".
You case x1, x2 are vectors and you cannot use the condition like that. You have to use like shown below. n = -5:5; A = 0.8...

6 giorni ago | 0

Answered
connecting points with the same value
REad about contour Z = peaks(100) ; pcolor(Z) ; shading interp hold on contour(Z,[1 1],'k') % show/join the value 1 with ...

6 giorni ago | 0

Answered
How to use imported data with trapz( )
T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1129920/H182%20Drag.csv') ; x = T.(1) ; y = T.(2)...

6 giorni ago | 0

Answered
Join strings together with '_' between them
a = {'A11';'A12';'A21';'A22';'A23';'A24'}; b = {'A300';'A5300';'A291';'A5291'}; a1 = repmat(a,length(b),1) ; b1 = repelem(b...

6 giorni ago | 0

| accepted

Answered
How do I compute the standardized sample mean from this data?
N = 10000; a=0; b=1; x = a+(b-a)*rand([N,1]); lambda = 1; Y = -log(x)/lambda; Y_std = (Y-mean(Y))/std(Y) ; mean(Y_std)

6 giorni ago | 0

Answered
Create a Matrix with Euclidian Distances between Coordinates
A = rand(8,2,3) ; B = permute(A,[1 3 2]); B = reshape(B,[],size(A,2),1) ; iwant = squareform(pdist(B))

6 giorni ago | 1

| accepted

Answered
Use a command only once
Make theta_b also a input variable. % Inputs are reference voltage Vdr and Vqr,reference current ,Idr and Iqr % and measured ...

7 giorni ago | 0

Answered
How do I extract values of a matrix based upon an ID array?
REad about knnsearch x = [0 0 1 2] ; y = [0 0 1 2] ; [X,Y] = meshgrid(x,y) ; A = rand(4) ; idx = knnsearch([X(:) Y(:)],[1 ...

7 giorni ago | 0

Answered
HOW TO OPEN IMAGE AS ATTACHED
Your is is a hdr image. Read about hdfread

7 giorni ago | 0

Answered
How to plot and filter some values from a csv file?
sonar_F_030 = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1127720/sonar_F_030.csv'); x1 = sonar_F_...

9 giorni ago | 0

Answered
How to graph 3 cylinders together.
Youmay modify the belo code and achieve it. Radius = 2. ; % Radius of the cylindrical theta = 360. ; % A...

10 giorni ago | 0

Answered
not able to plot
You need to save like shown bel and then plot: clc %% DESIGN ASSIGNMENT 1 %% %%-----------given----------%% Alt = 35000...

10 giorni ago | 0

Answered
syms x >> int(OHF(x,0,0,0),x,0,2) getting error msg " Undefined function 'OHF' for input arguments of type 'sym'".
x = OHF(rand,rand,rand) function out =OHF(b,mu,eta) syms x out=x^(mu-1)*(x+b+sqrt(x^(2)+2*b*x))^(-eta); end OR x = OHF(r...

10 giorni ago | 0

Answered
change legend name of ROC
plotroc(Ts,Y) hLegend = findobj(gcf, 'Type', 'Legend'); %get text hLegend.String % Change hLegend.String {'One' 'Two' 'Thr...

11 giorni ago | 1

| accepted

Answered
I want to change the size of a patch of .mat files from 40x40x40 to 64x64x64
Read about imresize3. I1 = imresize3(I,[64 64 64]) ; % I is your 40x40x40 image

11 giorni ago | 0

Answered
Plotting voltage vectors to head to tail
Vs = rand(1,2) ; Irc = rand(1,2) ; Vrrc = rand(1,2) ; Vcrc = rand(1,2) ; A = [Vs;Irc;Vrrc;Vcrc]; % GEt coordinates P ...

11 giorni ago | 0

Answered
Avoiding (X,Y)=(0,0) from loop
M=64; r = linspace(10^-3,1,M); theta = linspace(0,2*pi,M); [R, THETA] = meshgrid(r,theta); X = R....

11 giorni ago | 0

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