Community Profile # KSSV

Last seen: Today Active since 2011

Professional Interests: Mathematical Computing

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How do I find max values in a vector
v=[1, 3, 5, 2, -4, -3, -1, 2, 3, 1, 2, -3, -2, -4] ; iwant = [max(v(v>0)) min(v(v>0)) max(v(v<0)) min(v(v<0))]

15 hours ago | 0

plotting multiple vertical lines on a graph
figure(1) cla; scatter(x(:,a),y(:,a)) xlabel('X Coordinates') ylabel('Y Coordinates') title('Particle locations in the rice...

15 hours ago | 0

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I want to change xlim,ylim of axes , and draw a circle at the point I chose when I click on a place in the axes in GUI
th = linspace(0,2*pi) ; R = 1. ; % Radius of circle x = R*cos(th) ; y = R*sin(th) ; figure axis([-5 5 -5 5]) ; % cahange...

18 hours ago | 0

Output of [~,IDX] = max(...) not in DOUBLE but in INT.
You can convert double into integer using int32 ot int64.

18 hours ago | 0

How to plot a curve between 2 data sets
P1=[2.3;3.9;3.5;4.8;5.5;6.3;7.4]; P2=[4.8;5.7;6.5;7.8;9.2;10.5;11.8]; D=[78;65;57;52;46;32;27]; %% Dp=P2-P1; Q=0.24*D; % ...

19 hours ago | 0

How to insert variables (string) in MATLAB function
syms t R=[1 0 0;0 cos(t) -sin(t); 0 sin(t) cos(t)]

20 hours ago | 0

Monthly Time Series Plot
You can do intepolation by creating your required time stamps or use the inbuilt function retime. https://in.mathworks.com/help...

20 hours ago | 0

How to change output format 20 culumn!
r = 2; % number of rows c = 30 ; % number of columns M=rand(r,c)

20 hours ago | 0

How do I plot quivers on a curve?
If you are expecting colors based on the magnitude use this: https://in.mathworks.com/matlabcentral/fileexchange/3225-quiverc

23 hours ago | 0

generate column array with day in year number for each hour in a year
r=repmat(0:364,24,1) ; r=r(:);

4 days ago | 2

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How to find how many intersections in a graph?
Refer this function: https://in.mathworks.com/matlabcentral/fileexchange/22441-curve-intersections

4 days ago | 0

how to repeat an input question
A = 'start' ; while ~strcmpi(A,'end') N=input('what is N?: ') %establishes N A=input('give me a sentence!: ','s'); %a...

4 days ago | 0

Find a y axis increasing point in a plot -
Let y be your array. idx = find(y==1) ; iwant = idx(1)-1

4 days ago | 0

Convert an integer into a decimal number
m=2 m/10 If your class of variable is int32 or int64 i.e. an integer. Then convert it to float using double. m = int64(2) ...

5 days ago | 0

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Can you create a matrix where every element is a vector?
You can consider each element as a cell. And then create a cell array. But why? A = cell(2) ; A{1,1}=rand(1,3) ; A{1,2}=rand(...

5 days ago | 0

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Problem using fft();
Remove the mean from the data and then use fft. Say A is your data, (array). For fft use: A = A-mean(A) ;

5 days ago | 0

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How to plot NaN value
idx = isnan(A) ; A(idx) = 0 ; surf(A) view(2)

5 days ago | 0

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How to find all intersections in a Matlab graph?
USe this file exchange: https://in.mathworks.com/matlabcentral/fileexchange/22441-curve-intersections?requestedDomain=

5 days ago | 0

Storage results in an array
x=[2,3,4,5,6]; y=zeros(size(x)) ; for i = 1:length(x) if x(i)>4 y(i)=x(i)^2 else y(i)=x(i)+2 ...

5 days ago | 0

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What does 'li' mean?
1i stands for complex number. i.e. sqrt(-1). c=2+3*i c=2+3*1i

5 days ago | 0

how can I extract 2D matrices for xy, xz, yz planes from a 3D matrix and use the pcolor function?

5 days ago | 0

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How to read the desired coordinates from this image and find the coordinates with the highest value
You have plotted this image with the coordinates in hand. USe max function to get the maximum value. Read about function max. ...

6 days ago | 0

How do I plot and return the values of multiple intersections between a function and zero?
You can consider using this: https://in.mathworks.com/matlabcentral/fileexchange/22441-curve-intersections

6 days ago | 0

find minimum from cell array
T = readtable('my_excel.xlsx') ; [val,idx] = min(T.(2)) ; % get minimum from col2 iwant = T.(1)(idx) ; % get the value I...

6 days ago | 0

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I have matrix A and I need to find (e^(At)) where t is the sampling time. How to find that? Also what is the difference between exp(A) and expm(A)?
A = rand(2) ; t = linspace(0,1) ; iwant = zeros(2,2,100) ; for i = 1:100 iwant(:,:,i) = exp(A*(t(i))) ; end exp might ...

6 days ago | 0

how to visualize a data with lon, lat and time array

6 days ago | 1

How do i find max value between 1 and 13 column of 1001 columns.
x = rand(1,1001) ; y = reshape(x,[],13) ; % reshape iwant = max(y,[],2) ; % get max

6 days ago | 0

Running time Average of column values
If A is your column array. iwant = cumsum(A)./(1:numel(A))

7 days ago | 1