Community Profile

photo

Paul Hoffrichter


Last seen: 3 days ago Active since 2020

Statistics

All
  • 6 Month Streak
  • Thankful Level 2
  • Knowledgeable Level 3
  • Solver
  • First Answer
  • Revival Level 1

View badges

Content Feed

View by

Answered
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...

23 days ago | 0

Answered
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...

24 days ago | 0

Answered
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-"...

25 days ago | 1

| accepted

Answered
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...

26 days ago | 0

| accepted

Answered
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; ...

26 days ago | 0

| accepted

Answered
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...

1 month ago | 1

Answered
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)

2 months ago | 0

Answered
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( ...

2 months ago | 0

Answered
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....

2 months ago | 0

Answered
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));

3 months ago | 0

Answered
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 = ...

3 months ago | 0

Answered
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 ...

3 months ago | 0

| accepted

Answered
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...

3 months ago | 0

| accepted

Answered
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...

3 months ago | 0

Answered
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' ...

3 months ago | 0

Answered
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...

3 months ago | 0

Answered
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 ...

3 months ago | 0

Answered
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...

4 months ago | 0

| accepted

Answered
Newton Raphson - saving all values and using last iteration value as initial for next
The final x values match your spreadsheet results. Your suggested x0 converges too soon to be interesting. Set it to 1.0 to actu...

4 months ago | 0

Answered
Index in position 1 is invalid. Array indices must be positive integers or logical values.
Would be very useful if you are able to post a minimal program exhibiting the error that we could run. In the debugger, set the ...

4 months ago | 0

Answered
Index in position 1 is invalid. Array indices must be positive integers or logical values.
Would be very useful if you are able to post a minimal program exhibiting the error that we could run. In the debugger, set the ...

4 months ago | 0

Answered
I need help with using a while loop
Looks like you are trying to solve a difference equation. Take a look at what is happening: c1 = 0.1; v1 = 0.1; v2 = 1; p = ...

4 months ago | 1

| accepted

Answered
Keep a temporary variable after parfor
>> Parfor loop works when i comment out the plotting parts of the code. I tried what you said and only experienced what you wro...

4 months ago | 0

| accepted

Answered
how to fix Warning: Imaginary parts of complex X and/or Y arguments ignored
If you have a negative number raised to a non-integer power, you can sometimes get a complex number. Take a look at: https://ww...

4 months ago | 0

Answered
Solving a simple equation
Sorry, no idea if this is right. clc, clearvars %Angle = B %Thickness = u %Inner Radius = p %Developed length = L %L = L1+...

4 months ago | 0

| accepted

Question


Convert near zero complex parts to 0
In R2020a, I took a complex vector and converted near zero parts to zero. It took two long lines to do it. Can it be done in one...

4 months ago | 1 answer | 0

1

answer

Answered
What am I doing wrong here? I am trying to recreate following highlighted equations in the table.
clc; clear; clf ep = linspace(0,1); m1 = 1.5; m2 = 3.8; ep0= 1; alpha = 0.785; epp = 0.11; qep = (2.76*ep.*cosh((3*ep)-1.92)...

4 months ago | 0

| accepted

Answered
Script not found in the Command Windows
I am expecting that you will get the following: >> which essai 'essai' not found. Write down the folder where your essai.m fi...

4 months ago | 0

Answered
Obtaining the envelope of AM signal using hilbert transform
In general, if you increase the carrier frequency, you will get a better envelope. Specific to your figure, to remove the rippl...

4 months ago | 0

Answered
computing vectors with string and numbers (easy question)
Here is code that keeps the indexing scheme based upon the order in which the names occur in your vector of strings. >> S = ["H...

4 months ago | 1

| accepted

Load more