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# Teja Muppirala

### MathWorks

434 total contributions since 2011

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Figure作成時にNaNとInfだけ黒に指定する方法
NaNやInfを透明にして、背景を黒にすることは一つにアイディアです。 例えば： rng(0); X = peaks(20); % 適当なデータを作成 X(randperm(numel(X),3)) = nan; % 適当にNaNを入れる X(r...

6 giorni ago | 2

Up-sampling in convolutional neural network
I think you may be able to do it using a transposedConv2dLayer. This works, (though I'm not entirely confident that this is the ...

3 mesi ago | 0

how to overlay(superimpose) contour plot(coloured) over a gray scale image
A grayscale image with a colored contour plot superimposed: % Make some sample grayscale image I = abs(sin((1:500)'/100)*sin((...

4 mesi ago | 1

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Simultaneously numerically integrate coupled ODE's in MATLAB
You can get dx2/dt by multiplying dx2/dx1 * dx1/dt. As a simple example say (I'll use x and y instead of x1 and x2 cause it's...

circa un anno ago | 0

I need to overlay a color map over a gray scale image with with the colorbar on the side.
Something like this maybe? figure; ax1 = axes; imagesc(x); colormap(ax1,'gray'); ax2 = axes; imagesc(ax2,T...

circa un anno ago | 2

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How can I plot the graph of a gyroid which is composed of 3 variables in the form of F(x,y,z)=t
fimplicit3(@(x,y,z) sin(x).*cos(y)+sin(y).*cos(z)+sin(z).*cos(x)) Note that for element-wise multiplication I made sure to ...

oltre un anno ago | 0

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oltre un anno ago | 1

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oltre un anno ago | 4

Vectorization, check if points coordinate is exist in an image or no
signVector = ones(size(coordinates,1),1); inds = sub2ind(size(N),coordinates(:,1),coordinates(:,2)); % Convert to linear in...

oltre un anno ago | 0

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How to find volume under fitted data?
If you have a function y = f(r), which it sounds like you do since you have a polynomial, then you can use integral. y = ...

oltre un anno ago | 0

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InterX issues. Showing intersection when there is none.
The intersections are actually there. The issue is just in plotting. Straight lines between two points aren't straight on a s...

oltre un anno ago | 1

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How do I solve a second order non linear differential equation using matlab.
syms z(t) t A B zp = diff(z,t); zpp = diff(z,t,2); eqn = ( zpp + A*zp^2 == B ); cond = [z(0)==0, zp(0)==0...

oltre un anno ago | 1

Moving a curve in one axis to ascertain area under the curve is zero
Calculate the value of the integral when d_opt = 0, and then use that to set d_opt to cancel the integral out. b = 0.1; ...

oltre un anno ago | 1

How to input transfer function without simplifying it?
s = tf('s') G = (s+2)/(s*(s-1)*(s+6)^2) This gives a transfer function (tf) with the polynomials expanded G = ...

oltre un anno ago | 3

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Matlab's quad equals 0 when over 0 to 6 and actual value over 3 to 5
First, QUAD is very outdated, <https://www.mathworks.com/help/matlab/ref/integral.html INTEGRAL> (introduced in R2012a) is recom...

oltre un anno ago | 1

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How to ensure text on plot always in front?
One workaround would be to create an invisible axes on top, and then put the text in there. figure ax1 = axes; mesh(a...

oltre un anno ago | 1

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はい、多入力多出力モデルの同定も可能です。 例えば： <https://jp.mathworks.com/help/ident/examples/dealing-with-multi-variable-systems-identification-...

oltre un anno ago | 3

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looking for something similar for maximum filter calculation
Yes, in MATLAB the function is <https://www.mathworks.com/help/images/ref/imdilate.html IMDILATE>. The "NHOOD" argument is an...

oltre un anno ago | 0

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Applying equation to each field in a structure
For 4 variables, copy/pasting seems doable, but if you had a lot more I can see how it could be cumbersome. This is a soluti...

oltre un anno ago | 0

Would be possible to calculate half hour average by using retime?
Yes, there is an example a little bit down the in the documentation for <https://www.mathworks.com/help/matlab/ref/retime.html R...

oltre un anno ago | 0

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How to save an axes within a GUI to a .fig
This might work. You create a new (temporary and invisible) figure, and then use COPYOBJ to copy that axes to the new figure. Y...

oltre un anno ago | 2

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Is there any way I can make the attached contour plots more smooth ?
Maybe a median filter? However ORDFILT2 needs the Image Processing Toolbox. Z = peaks(501); % Sample data Z = Z +0.1*ran...

oltre un anno ago | 0

Why is getting Uniform Random Numbers so difficult!?!?
Try putting the seed value to: randi(intmax)

oltre un anno ago | 0

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Double integral with one integral having limits as a function of other variable
You can put functions inside of functions %% Embed A into fun_Z0, and tell INTEGRAL to only accept scalar inputs l1=3e...

oltre un anno ago | 0

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Where is the issue in my "while" statement?
You were on the right track. This gives 2520: n=1; while any( mod(n,1:10)~=0 ) n=n+1; end n Whe...

oltre un anno ago | 0

Numerical Integration with Parameters
For example, if the function is f(x) = 1+s*x+b*x^2 and you're integrating from 0 to 1, and you want to find the b (numerically) ...

oltre 2 anni ago | 0

System of differential equations with constant (as variables) coefficients
As has been mentioned, with the k's explicitly accounted for, it's very complicated. But if you consider the matrix X simply ...

oltre 2 anni ago | 2

How to create a loop to sum across columns conditional on index matching?
result = [unique(A(:,1)) grpstats(A(:,2:end),A(:,1),@any)] % Keep it binary or result = [unique(A(:,1)) grpstats(A(:,2...

oltre 2 anni ago | 1

グレースケールの3次元マッピング
たとえば： I_RGB = imread('peppers.png'); I_gray = rgb2gray(I_RGB); h = surf(I_gray); % surf関数で表面を作成する h.EdgeColor = 'n...

oltre 2 anni ago | 4

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