Community Profile # SYML2nd

Last seen: 13 dagar ago Active since 2018

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Question

black line frame around scatter3
I plotted in 3d with scatter3 and then I used: view(0,90) Now I would like to add a black line frame on the top and on the lef...

12 dagar ago | 1 answer | 0

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Question

inclined number in x-axis using scatter3 view(0,90)
I plotted an image that I created with an older version of Matlab. I plotted it in 3d with scatter3 and I plotted using: view(0...

17 dagar ago | 1 answer | 0

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Question

Linear interpolation two array with target value in one array
Given two array A=[483, 427, 306, 195] B=[0, 0.25, 0.5, 0.75] Given a target the value 241, which is between the values 30...

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Does pwelch function adopt already the correction factor due to the window?
Does pwelch function adopt already the correction factor due to the window? When we use a window like hamming a correction fa...

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Question

pwelch info: equation involved and problem on the integral
Hi, I would like to reduce the noise in my psd. Given a signal in time u, that has a length of 80001, and decided the length of...

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Question

From plot to video
Hi all, I have done this code and I obtain a plot of graphs where every graph represent the result at a different second. How c...

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Question

I would like to compile a text string for each one of the three index of two given arrays
Hi, Given two array XX=[1,2,3] YY=[3,2,1] and a typical string: &DEVC ID='vel_XX', QUANTITY='VELOCITY', ABC=YY,0.0525,9.74/ ...

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Question

Curve Fitting Tool - Weibull distribution
Hi all, I am trying to do a fitting of a graph, using the curve fitting Tool and, in particular, using the Weibull option that...

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Question

Create a 2d matrix with two nested cycle
Hi all, I am trying to create a 2d matrix with two nested cycle. My code is really complex, so I have written a very simple ve...

ungefär ett år ago | 1 answer | 0

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Question

Concatenate horizontally two tables
Hi, I have two tables 3262x218 (let's call it A) and 3262x255 (let's call it B) . Both have an header line. I want to concaten...

mer än ett år ago | 1 answer | 0

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Question

system of 3 equation with 3 unknown, with two 2nd order equation
Hi, I am trying to solve a system of 3 equation with 3 unknown, with two 2nd order equation using this code, but unfortunately...

mer än ett år ago | 1 answer | 0

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Question

thick values i log scale
Hi all, I would like to obtain (using the loglog in order to plot the graph) a thick line on the abscissa thick with the value...

nästan 2 år ago | 1 answer | 0

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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...

nästan 2 år ago | 1 answer | 0

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Question

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 ...

ungefär 2 år ago | 1 answer | 0

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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...

mer än 2 år ago | 1 answer | 0

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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...

mer än 2 år ago | 1 answer | 0

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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 ...

mer än 2 år ago | 0 answers | 0

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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...

mer än 2 år ago | 1 answer | 0

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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 ...

mer än 2 år ago | 1 answer | 0

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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)/(...

mer än 2 år ago | 0 answers | 0

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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 ...

mer än 2 år 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...

mer än 2 år ago | 4 answers | 0

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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...

mer än 2 år ago | 1 answer | 0

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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...

mer än 2 år ago | 1 answer | 0