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Francesco Saverio Ciani


13 total contributions since 2018

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Question


find the σ and the μ of the lognormal function, having 1st percentile and the 99th percentile
I have to build find the σ and the μ of the lognormal function, having the value of the 1st percentile (which is 30) and the 99t...

24 days ago | 1 answer | 0

1

answer

Question


remove the first header
Hi I have this csv file. As you can see in the png file the first header is useless for me. I want to import a table and then ...

4 months ago | 1 answer | 0

1

answer

Question


fft of sin(pi*x/5)./(pi*x) returns NaN
Hi, I don't know why, if I do the G=sin(pi*x/5)./(pi*x), it returns NaN, can you help me? Thanks x=-100:0.1:100 G=sin(pi*x/5...

5 months ago | 1 answer | 0

1

answer

Question


expected value formula in xcorr
Hi all, when I use the xcorr, the formula used in matlab is C(m) = E[A(n+m)*conj(B(n))] = E[A(n)*conj(B(n-m))] where E is the e...

5 months ago | 1 answer | 0

1

answer

Question


PSD-Wiener Khinchin-xcorr problem due to the division coefficients of the PSD
Hi, I am trying to calculate the PSD from the autocorrelation. I am finding the following problems doing this (it is mandatory ...

5 months ago | 0 answers | 0

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answers

Question


do the psd using different methods (maybe there is a problem in the normalization9
Hi, I would like to verify if the result is the same using the first method described herehttps://it.mathworks.com/help/signal...

6 months ago | 1 answer | 0

1

answer

Question


obtain the fourier trasnform doing the fft. Do I need to normalize??
Hi, I have a signal in time domain, actually, specific kinetic energy was calculated in time domain and its medium value is 10 ...

6 months ago | 1 answer | 0

1

answer

Question


homographic interpolation of experimental data point
Hi all, I have a theoretical and practical problem. I want to do interpolation using this homographic function y = (ax + b)/(...

6 months ago | 0 answers | 0

0

answers

Answered
frequency vector in a fft
First of all thank you for your answer. But I have still doubts? So was my frequency correct? I didn't get why you multiplied ...

6 months ago | 0

Question


frequency vector in a fft
Hi all, I am trying to do the fft of a signal (here attached cc.txt), unfortunately I do not understand which frequency I shou...

6 months ago | 2 answers | 0

2

answers

Question


how tocreate a new array that select the columns with a specific prefix in the header row
Hi, I would like to create a new array that select the columns with a specific prefix in the header row. In particular you can...

8 months ago | 1 answer | 0

1

answer

Question


3D Plot from xls
Hi all, I am a new user of Matlab, I have a file .xlsx and I would like to plot a 3d graph of these data. Unfortunately I was n...

8 months ago | 1 answer | 0

1

answer

Question


Error in power_spectrum (line 9) M = csvread(devc_file,2,0);
Hi, I am new user of matlab and I need to use a matlab file that a developer did. Unfortunately I see this error: Error in pow...

1 year ago | 1 answer | 0

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answer