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# Paul Hoffrichter

Last seen: 29 jours il y a Actif depuis 2020

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Question

Why isn't low pass filter centered around zero?
I tried several MATLAB filter examples (in R2020a), but all of them appear to be off-centered. Below is example taken from https...

3 mois il y a | 1 réponse | 0

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Question

Gfsk demodulation of signals with non constant amplitude
I have a real GFSK signal that occupies 500KHz whose center frequency could be, say 20 MHz. Not doing the diff(angle(Y)) since a...

4 mois il y a | 1 réponse | 0

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Question

datatip gives same x value for different samples
Here is a simplified example of my problem. How can I get tooltips to show X 500000, X 500001, X 500002, etc.? Instead it shows ...

4 mois il y a | 1 réponse | 0

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Question

How to manually move (smoothly) a set of evenly spaced xlines
In R2020a on a plot I plan on having a loop to produce 20 xlines that are 200 samples apart. (I know that in later versions, one...

4 mois il y a | 2 réponses | 0

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Section color no longer an option in 2021b?
When I called MathWorks about coloring of the call stack lines (above the current function) when stepping through the r2021b deb...

5 mois il y a | 2

Question

Find longest pattern of [1 0] in array.
I have Bits0 array of 1's and 0's. I would like to get the start/stop indices of the largest sequence of 1 0's. Actually, I expe...

6 mois il y a | 1 réponse | 0

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Question

View an .slx model without Simulink
I downloaded a free Intro SDR book from MathWorks. But the labs have .slx files. I would like to be able to view the model. I h...

8 mois il y a | 1 réponse | 0

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Question

Viewing .slx model figue without Simulink
I have Matlab R2020a and R2022a, but no Simulink. I downloaded a free Intro SDR book from MathWorks. But the labs have .slx file...

8 mois il y a | 1 réponse | 0

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Question

How to zero out short non-zero regions in vector?
For a minLength integer input value, zero out short non-zero regions. The input vector, A, typically will have long regions of ...

9 mois il y a | 1 réponse | 0

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Question

How to create Plot button for Complex vector?
I would like to be able to highlight a complex vector in the workspace and be able to click a button to plot complex vector the ...

10 mois il y a | 2 réponses | 0

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[DISCONTINUED] MATLAB Answers Wish-list #5 (and bug reports)
PROJECTS is too closely coupled with Git CM Some users may want to have a limited view of the files in the Set Path folder list...

environ un an il y a | 1

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How to assign a variable based on an equation?
Inline anonymous functions can be defined as follows: Density_equation = @(x) x^2 + 2*x + 10 T = 1000 Density = Density_equat...

plus d'un an il y a | 1

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How to set the plot start to zero ? I have some measurements. On the x label, they start from 0 to 6, but from 1 I can see something change on
First of all, you should be aware that the following two expressions are equivalent: >> 1:5.12 ans = 1 2 3 4...

plus d'un an il y a | 0

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How do I find the separation between the harmonics for a graph of a function sinx/x against x?
Not sure if thisis what you are looking for. x=linspace(-90,90,10000); y=sin(x)./x; figure(11) plot(x,y); axis([-90 90 -1.5...

plus d'un an il y a | 0

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How create an Histogram of datas?
c = [ "3-" "0" "0+" "0-" "0+" "0" "0-" "0-" "0-" "0-" "3" "0-" "U" "3" "U" "U" "2+" "0" "1-" "2-" "3-" "1-"...

plus d'un an il y a | 1

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Converting a 1D antenna array to planar array in 3D space
Fc=1255e6; %/Hz Carrier frequency C=3e8;%/m/s Speed of light Lambda=C/Fc;%/m Wavelength ESepx=0.49*Lambda; %/m Element separa...

plus d'un an il y a | 0

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How to set the plot start to zero ? I have some measurements. On the x label, they start from 0 to 6, but from 1 I can see something change on
Here is some made up data to illustrate one approach: x = [ 0 1.1 2 3.3 5.12]; y = [146 145.9 145.8 139 128; ...

plus d'un an il y a | 0

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For loop with two conditions
>> this code where it should stop as soon as one of the conditions has met But the break just gets you out of the while loop w...

plus d'un an il y a | 1

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discrete time signal, i am not able to generate a function for the following question
Try this to fix the error: N1 = 0; N2 = 8; alpha = 0.8; figure(1) x= alpha .^ (N1:N2); plot(x)

presque 2 ans il y a | 0

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How to multiply 2 fft's with different lengths?
Is this your desired effect? [x,Fs]=audioread('hello.wav'); sound(x,Fs); T=1/Fs; disp('Wait for music to complete') pause( ...

presque 2 ans il y a | 0

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How can I run multiple iterations that plot on the same graph?
If you are new to Matlab programming, then you are probably used to a for-loop and you are plotting the curve in each iteration....

presque 2 ans il y a | 0

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How to delete/cancel trailing zeros in complex and imaginary numbers?
a = 1.22000000 + 2.150000000i fprintf("%g + %gi\n", real(a), imag(a)); fprintf("%.2f + %.2fi\n", real(a), imag(a));

presque 2 ans il y a | 0

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How do i create a large matrix with a formula?
Since you did not specify T and f, I assume you wanted symbolic notation. (I picked N = 10 to show a brief output.) N=10; n = ...

presque 2 ans il y a | 0

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How to find the CUP time used by each function in my code?
If you need a profile of the relative time spent in every function when running your entire script, then while viewing the main ...

presque 2 ans il y a | 0

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after applying a filter -i design- to a real signal, it returns complex signal after ifft
Your imaginary part only is non-zero due to the usual floating point roundoffs and truncations. Fix this using round: signal=if...

presque 2 ans il y a | 0

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How to construct array with certain slope ?
Look at this rotation script example: https://www.mathworks.com/matlabcentral/answers/93554-how-can-i-rotate-a-set-of-points-in...

presque 2 ans il y a | 0

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Problems with changing the order of a binary representation
NJ=4 for i = 1:2^NJ-1 struct(i,:) = fliplr(dec2bin(i,NJ)); end struct = 15×4 char array '1000' '0100' ...

presque 2 ans il y a | 0

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How can I justify my matrices?
I find this form using Live Editor preferable to pretty. syms t1 t2 t3 d3 a2 J11 = [-cos(t1)*(d3*cos(t2+t3) + a2*cos(t2)), sin...

presque 2 ans il y a | 0

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How can I insert zeros into every other index of a column vector?
@carles Martinez >> and in an horizontal array? Whether A is vertical or horizontal, use upsample. A = 1 2 3 ...

presque 2 ans il y a | 0

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How to write summation in matlab with two variables?
I am new to sym, so I thought I would give this a try. Please check carefully, as I did not have time to do so. I hope you are d...

presque 2 ans il y a | 0

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