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Naman Chaturvedi

MathWorks

2018 年からアクティブ

Application Support Engineer at Mathworks India Pvt. Ltd.

Any comment made here is solely my opinion and owned by me. Mathworks is not responsible for whatever I say.

統計

  • Knowledgeable Level 4
  • 3 Month Streak
  • First Answer

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Apply a colored filter on grayscale image?
You grayscale image (say iRed) is a m*n*1 matrix. (m, n are x and y dimensions). To make the grayscale image iRed to redscale im...

約5年 前 | 0

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How can i change the step input to cubic polynomial curve in simulink
PFA. I made 45(t^3)/125 signal. Hope this helps.

約5年 前 | 0

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Doubt regarding processing of Upsampling and Downsampling Data in an Image.
Theoritically speaking, yes. You will actually be using just 25% of your original image's data points (50% in x, 50% in y). But ...

約5年 前 | 0

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ECG signal filteration required
You can use the method mentioned in https://www.mathworks.com/help/signal/ug/remove-the-60-hz-hum-from-a-signal.html and use a b...

約5年 前 | 0

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How can i connect simulink and matlab together?
The variables K1-K6 should just be present in the base workspace and Simulink will pull the values from there. If you have a fun...

約5年 前 | 1

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Mesh Plot from Data Points
Hi Garret, To use surf(x,y,z), x, y and z should be matrices of the same size.Also, as you may know, the x, y and z are from th...

約5年 前 | 0

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What will be the specifications for designing 50/60 Hz Analog Low Pass Filter in Simulink?
It really depends on your use case. For instance, Chebyshev filter gives a faster roll-off rate than Butterworth by allowing mor...

約5年 前 | 1

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How to use latin hypercube sampling? Neural network optimization help?
Since your simulation is quite time consuming and you are considering sampling methods as well, I would suggest an approach like...

約5年 前 | 1

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trapz errors in compiled code but not script
From the documentation of trapz(https://www.mathworks.com/help/releases/R2018a/matlab/ref/trapz.html): Q = trapz(X,Y) integra...

約5年 前 | 0

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How to fix remote Matlab display resolution when using ssh -X?
You can try using Painters as a renderer only instead of OpenGL. Use -noopengl flag while opening MATLAB from the command line t...

5年以上 前 | 0

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How can I delay a chirp signal for signal processing?
t=1; delay=t*1e3; %delay of 1 seconds z=zeros(1,delay); %delay is the no. of delay samples signal=[z,signal]...

5年以上 前 | 1

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I want to detect flowers of two kinds of plants,what kind of features I should extract in such images?
For this particular problem, you can check the standard deviation in all the three color spaces and identify the flower based on...

5年以上 前 | 0

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Plot multiple realizations of a Makrov chain in the same plot
<https://www.mathworks.com/help/matlab/ref/hold.html hold on>

5年以上 前 | 0

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I use xlswrite and xlswritespec all the time. I am having a specific problem with xlswrite (see below)
Did you make sure that the file is not open? xlswrite() actually launches Excel and tries to open the file. So if you have t...

5年以上 前 | 0

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3D axis rotation with meshgrid
You aren't plotting the updated values X and Y. Last line should be:- >> contourf(X,Y,B,25,'LineStyle','none')

5年以上 前 | 0

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MATLAB Autoscaling Issue for Constant Numbers
You can use <https://www.mathworks.com/help/matlab/ref/axis.html axis> and <https://www.mathworks.com/help/matlab/creating_plots...

5年以上 前 | 0

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Turn off plot confidence bounds
The plot p shows the data, the fit and the confidence handle. The visibility of the confidence bounds lines can be set to 'off' ...

5年以上 前 | 1

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chi2pdf WITHOUT using a for loop
Element wise multiplication can be performed using the '.*' operator. So, if you have two matrices say X (n x m) and y(n x m) an...

5年以上 前 | 0

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Restore sinusoid signal data
One way would be to find the frequency of the signal from the clean part of the signal by calculating the distance between the f...

5年以上 前 | 1

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Is the result from xcorr(zscore(X),zscore(Y), 'coeff') the same as correlation coefficient for each lag position?
Yes, you are correct. It does give the correlation coefficients for the every lag values. By using 'coeff' the following changes...

5年以上 前 | 1

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Cell detection and segmentation on image with uneven background and low resolution
Try texture segmentation and then the cell detection and segmentation. Check out <https://www.mathworks.com/campaigns/offers/ima...

5年以上 前 | 0

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How to add the strings in three for loops
Correct code: ht=cell(3,1); for i=1:3 for k=1:3 for m=1:3 if (k*m==1) ...

5年以上 前 | 0

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FFT Transform on vectors
This should help. For sliding window; % x=signal % A=output array % shift=shift of sliding window % windowlen=w...

5年以上 前 | 0

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How i can generate clean %50 duty square waves ?
You can try improving the samples per cycle and making your signal more sharp as long as it obeys the size limits, if you still ...

5年以上 前 | 0

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Variable Step between only two values
You can use the sim command to simulate the model from a start time, to a stop time and with a time step. Eg:- If your simulatio...

5年以上 前 | 0

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How can I fix this error?
You are getting the error because after performing 'y=diff(y)', y becomes '[]' which makes the RHS '[]' as well. The correct cod...

5年以上 前 | 0

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Mux a variable number of signals without mux block
I hope something like this would solve your problem. <</matlabcentral/answers/uploaded_files/131470/mux.png>> I have used ...

5年以上 前 | 0

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Combining symbolic integral expressions
Hi Randolf, To check the validity of K==L, you must expand the equation and then simplify it as shown: >> logical(simpli...

5年以上 前 | 2

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Can anyone tell me how to calculate this integration using integral2? I am using the below code but not getting the desired result.That is why I want to use integral2.
If f1 is your t_A and x,y your variables, you can use >> F=@(x,y) f1(x,y).*exp(-i*2*pi*(x*u+y*v)/(lambda*f)); >> I=int...

5年以上 前 | 0

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How do I plot three waves (sin, triangle, and square) with a Vp-p of 4V and the function generator set at 1KHz
If its MATLAB you want to plot it in, f=1000; t=0:0.00001:0.002; s=2*sin(2*pi*f*t); tr=2*sawtooth(2*pi*f*t); sq=2...

5年以上 前 | 0

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