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Yuan Li


Last seen: presque 2 ans il y a |  Actif depuis 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!

plus de 4 ans il y a | 1 réponse | 0

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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 ...

plus de 4 ans il y a | 0

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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]

plus de 4 ans il y a | 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]);

presque 5 ans il y a | 1

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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...

presque 5 ans il y a | 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);

presque 5 ans il y a | 0

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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...

presque 5 ans il y a | 0

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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...

presque 5 ans il y a | 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...

presque 5 ans il y a | 0

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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.

presque 5 ans il y a | 0

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

presque 5 ans il y a | 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 ...

presque 5 ans il y a | 0

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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.

presque 5 ans il y a | 0

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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...

presque 5 ans il y a | 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.

presque 5 ans il y a | 0