# KSSV

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

Professional Interests: Mathematical Computing

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**Content Feed**

Find maximum value for every four hours

Read about reshape. Reshape your data so that one dimension corresponds to four hours and then use max.

7 hours ago | 0

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How to plot a graph by extracting the variables from each .mat file?

matFiles = dir('*.mat') ; N = length(matFiles) ; figure hold on for i = 1:N load(matFiles(i).name) ; scatter(...

7 hours ago | 0

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How do I plot multiple curves on the graphs for different values of variable (plot effect of changing the variable)

You need to run a loop like shown below: clear % Parameters A=0.19038; Ea=69710; Hr=-23237; Dp=0.013; roecatbulk=2000; eps=...

17 hours ago | 0

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can someone please explain me how to plot this fourth x4,y4 line in this graph?

plot(x4,y4,'*g')

1 day ago | 0

how to take average of each column of matrices

A = randi(9,[6 3 6]); iwant = mean(A,1)

1 day ago | 0

how to find time corresponds to peak of plot?

If (t,x) is your time and respective data. [val,idx] = max(x) ; t_maxx = t(idx)

1 day ago | 0

PLEASE SOMEBODY HELP ME!!

This is a simple homework. You have to work on you own. For a reference refer this: https://in.mathworks.com/matlabcentral/fil...

1 day ago | 0

how to find the inner values between to integer value

t = [6 7] ; p = [30 180] ; % interpolation ti = t(1):0.05:t(2) ; pi = interp1(t,p,ti) ; % plot plot(t,p,'*r',ti,pi,'-b') ...

1 day ago | 0

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How to locate number from a matrix

If idx is the indices of the locations in second column...to get the respective first column just use: iwant = list2(idx,1)

1 day ago | 0

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Imagine a vector of g = (5 6 3 7 5 4 4 9 8 5 7 8 9 9 5 4 6 8 8 7 6 7 7 7 8 8). And am asked to find the number of data greater than 5. How will I do this. Part b. How will

Read about logicals Read about indexing Read about >, <. >=, <= i.e. operators Read about pie

2 days ago | 0

How can I find the intersection points between two curves and area between these curves?

You can use this file exchange to get intersection points: https://in.mathworks.com/matlabcentral/answers/621553-finding-the-int...

3 days ago | 0

To find Group delay : Error using diff Difference order N must be a positive integer scalar.

Replace the line: gd = diff (ph,(2*pi*f0)); with gd = diff([ph (2*pi*f0)]);

3 days ago | 0

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Adding Drunk effect to images of a dataset

Read about ImgeAugmentationDatastore. https://in.mathworks.com/help/deeplearning/ref/augmentedimagedatastore.html

3 days ago | 0

How can i work with a set of column vector that has 365 rows. I want to find the mean between the 172 and 265 data only. Not all the mean.

You extract your required data using indexing. iwant = A(172:265,:) ; % extract array from 172 to 265 all the columns

3 days ago | 0

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Extract Tables from within a cell

load('Tables.mat'); T = cellfun(@table2array,Tables,'UniformOutput',false) ; iwant = cell2mat(T') ;

4 days ago | 0

How can I find the index of a specific element in an array

R = 5000; T = [0 8 39.3 103 236.5 511.7 1026.1 1906.9 3148.7 4293 4011.9 2628.4 1037.4 203.7 28.6 9.4 4.2 1.4 1....

5 days ago | 0

How do I have different colours for each plot even having a different option in the popupmenu

x = (1:10)' ; A = rand(10,3) ; figure plot(x,A(:,1),'r',x,A(:,2),'b',x,A(:,3),'g') figure plot(x,A) figure hold on plo...

5 days ago | 0

Detecting Contour of bubble

I = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/814649/image.jpeg') ; % Remove boundary/ crop I = ...

5 days ago | 0

how to change the orientation of an extrapolated image?

Let (X,Y) be your original grid data coordinates. lon0 = min(X(:)) ; lon1 = max(X(:)) ; lat0 = min(Y(:)) ; lat1 = max(Y(:)) ...

6 days ago | 0

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How to convert the complex number as a 2D vector to train a neural network

To get real and imaginary part of the complex number, use real and imag. For other part use reshape.

6 days ago | 0

finding number of centroids of a binary image

REad about regionprops. You can also try kmeans. Read about it.

6 days ago | 0

Is there any way that indexing(subscript) 0 can be permitted. As these should be positive integer or logicals.

Note that a logical is 0 / 1 idx = logical(0)

6 days ago | 2

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Geotif image appears darker

Use geotiffread / readgeoraster and the plot the data. Read about pcolor to plot.

6 days ago | 0

ODE45/ODE15 inquiry about nonlinear spring

You may refer the following links to understand what to do. https://in.mathworks.com/matlabcentral/fileexchange/33168-springpe...

7 days ago | 0

how to remove the NaN values from a dataset?

Read about isnan, A = [1 2 NaN 2 NaN rand] ; idx = isnan(A) ; A(idx) = [] % remove NaNs If you try to remove NaN's from...

7 days ago | 1

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I need to repeat a sequence 33 times

Read about repmat. A = [1 2 3] ; B = repmat(A,1,3)

7 days ago | 0

How to muliply non equal vectors with slicing?

A = 1:12; B = 1:4; A = reshape(A,4,[])' ; iwant = A.*B

7 days ago | 0

Extracting closed contours of streamfunction

Did you try this? https://in.mathworks.com/help/matlab/ref/streamline.html

7 days ago | 0

how to save variable as txt in a specified location with variable value appearing in the file name

path='c:/users/user/desktop'; filename = [path,filesep,'Gauss',num2str(width),'.txt']; fid = fopen(filename,'w') ; fprintf(fi...

7 days ago | 0

How to plot 3D filled contour ?

You can plot one level at a time: for i = 1:18 plot(lon,lat,levels(:,:,i)') shading interp drawnow end If you ...

7 days ago | 0