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Yuan Li


Last seen: 9 months ago |  Active since 2019

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The number of m sequence of the fixed length 2^n-1
I wanner know the number of m sequence for the fixed length 2^n-1. The related reference will help, too. Thank you very much!

3 years ago | 0 answers | 0

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answers

Answered
How to cut dimensions of 3d arrays in a cell.
B = cell(34,1); for ii = 1:34 B{ii} = precips{ii}(700:720,300:360,:); end Then you will get a new cell, each element of ...

3 years ago | 0

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Answered
Is there a command ( like "sort" for example ) arranges vector elements ascending ,max, descending (humped shap)?
Yes. Use sort. e.g. a = [1,3,2,4]; b = sort(a,'ascend');% b = [1,2,3,4] c = sort(a,'descend');% c = [4,3,2,1]

3 years ago | 0

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How to generate a rectangular signal or wave of ?( ?/6 ) using the sign function.
t = 0:0.1:100; a = sign(sin(pi.*t./6)); figure,plot(t,a); ylim([-1.5 1.5]);

3 years ago | 1

Answered
What actually this code explains? where it is used and how to interpret it?
In the signal processing field, y is the power of signal x. the square of 2-norm of x can be seen as energy of x, numel(x) is t...

3 years ago | 1

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How to select every nth value with the last value fixed from a column?
use a = original_vector(1:100:4901);

3 years ago | 0

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Answered
How to break or split a line at NaN points in 1x15000 csv file?
You can start with finding the position of NaN, for example: a is your loaded data array; then use [m,n]=find(isNaN(a)); you...

3 years ago | 0

Answered
About complex variables functions,a a ridiculous problem! who can help me?
You need to refer the Complex Function to answer the question. The second step to the third step is not like that in complex fun...

3 years ago | 0

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How can I change where a variable is placed within the field width using fprintf?
fprintf(fid,['%' num2str(length(q.labels{i})) 's\t'],q.labels{i}); change the code in the for loop will help you solve the prob...

3 years ago | 0

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Answered
How can i find the BER of 4-QAM ?
In the matlab command window, type "bertool", and choose some specific options, then you will get your curve.

3 years ago | 0

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Answered
Fill a vector based on another vector
A(1:sum(B(:))) = 0; I hope the code can help you.

3 years ago | 1

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taylor series using forward method
I can't figure out the relationship between the following codes: f(i)=(f(x + h(i)) - f(x))/ (h(i));% evaluating the derivative ...

3 years ago | 0

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Answered
For Loop using in an array to find the value one by one
Use matrix operation directly. F = 0.4*20 + A; Then, F will be the vector you want.

3 years ago | 0

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Answered
Averaging 3D matrix value and reshape
A = zeros(15,8,40); A = June21_Once_StillMat(1:end,2:9,1:end); A1 = mean(A,3); then you will get a 15by8 matrix(mabe you need...

3 years ago | 0

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Too many output arguments
I can get the result using r2014a. I used the same input in your screen shot.

3 years ago | 0