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yang-En Hsiao


60 2018 年以降の合計貢献数

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質問


How to write a code to calculate the f '(3)?
If f(x)=,then i want to know what is the value after i differential it and replace x with 3 I mean first i calculate f ' (x)=,t...

1日 前 | 1 件の回答 | 0

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質問


How to write a code which can decrease the range of the answer until we get the right value?
I want to write a code which can help me decrease the range of answer until i find it.For example,S=0:0.001:1;and i have to find...

8日 前 | 0 件の回答 | 0

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質問


Is my code of rayleigh fading right?
Is my code of rayleigh fading right? H_A=1/sqrt(2)*[randn(2,6) + i*randn(2,6)]; Because it seems that i just create a AWGN cha...

12日 前 | 0 件の回答 | 0

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質問


If the values are almost equal to each other,how do i plot the figure to see its curve? (not straight line )
If the values are very similar to each other,how should draw them to see their different? I mean if the window show me when ...

12日 前 | 2 件の回答 | 0

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質問


How do i modify the code when a=0,a=0.1,...,a=0.9,a=1
I want to calculate the Ps when a=0.1,a=0.2,....,a=0.9,a=1.0 , so i think i should have 11 different Ps number,however,the windo...

12日 前 | 0 件の回答 | 0

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質問


How do i modify the code when a=0,a=0.1,...,a=0.9,a=1
I want to calculate the Ps when a=0.1,a=0.2,....,a=0.9,a=1.0 , so i think i should have 11 different Ps number,however,the windo...

12日 前 | 0 件の回答 | 0

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質問


How to find the nth is the higher than and closest to 0.3
A=[5 56 6.1 0.29 0.32 15 ] I want to find a value which not only be the closest to 0.3,but also higher than 0.3 As we know ,0....

13日 前 | 2 件の回答 | 0

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質問


How do i write a code which can calculate the null space basis of two random matrix?
How do i write a code which can calculate the null space basis of two random matrix? a=randn(5,3) b=randn(5,3) c=null([a;b])...

20日 前 | 1 件の回答 | 0

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質問


What is the different between "null" command and "svd" command
If there is a 5 by 3 matrix H ,i can use SVD to find the null space of H.But i find there is a "null "command,which can help me ...

20日 前 | 1 件の回答 | 0

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質問


How do i write a code which can calculate the cross production of two vectors?
How do i write a code which can calculate the cross production of two vector ? Both of these two vectors are 1 by 5 vector At ...

21日 前 | 1 件の回答 | 0

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質問


If i generate the complex gaussian in this method,are the sub-matrix all complex gaussian?
The main goal is to create 4 complex gaussian matrix ,h1~h4,each gaussian matrix is 4 by 1 matrix,and the direct method is h1...

5ヶ月 前 | 0 件の回答 | 0

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質問


Which is right for complex noise CN(0,N0/2)?
I want to create a complex gaussian noise CN(0,N0/2),which code is correct? noise=(randn(1,n)+1i*randn(1,n))*sqrt(N0/2) or no...

5ヶ月 前 | 0 件の回答 | 0

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質問


How to write the code to plot these two figure by using matlab? error probability and data rate in MIMO
I want to use Matlab to plot these two figures,fig(a) is the error probability,and as we can see,the higher M is,the lower error...

6ヶ月 前 | 0 件の回答 | 0

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質問


Why do i need to divided by log2(M) * Ts instead of Ts ? For the symbol error rate of 8-PSK
I saw this code of 8-PSK in the internet,and i don't know why do i need to divided by log2(M) * Ts instead of Ts code: M=8...

6ヶ月 前 | 1 件の回答 | 0

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質問


The conditional statements of 2-PAM,8PAM and 16PAM
I take this: https://www.mathworks.com/matlabcentral/fileexchange/19587-symbol-error-rate-in-4-pam-modulation as a reference to...

6ヶ月 前 | 0 件の回答 | 0

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質問


Why do we need to write the noise as randn(2,1)./sqrt(2*SNR) instead of randn(1,1)/sqrt(2)?
I saw this code, about the error probability of on/off signal ,on the internet Ts=10^4; SNR_dB=[-3 0 3 6 9]; Ne=zeros(1,lengt...

6ヶ月 前 | 0 件の回答 | 0

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質問


Why is the last simulation value is "0",i can't find where is wrong
I write an error probability of anti-podal,however,i found the last simulation value is zero,it means that there is no any erro...

6ヶ月 前 | 1 件の回答 | 0

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質問


Why does my code become like this?why does it happen?
Yesterday i run the code,and it still keep running ,and i found the code become this below suddenly,why?Why does my code become ...

6ヶ月 前 | 1 件の回答 | 0

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回答済み
Why does the window show me Number of columns on line 9 of ASCII file GOA_algorithm_2.m must be the same as previous lines,and my both subroutine are m.files
In the second code,we can see this line in the begining load('GOA_algorithm_2.m','P_q') So,this means we have to load the "P_q...

6ヶ月 前 | 0

| 採用済み

質問


Why does the window show me Number of columns on line 9 of ASCII file GOA_algorithm_2.m must be the same as previous lines,and my both subroutine are m.files
I want to run this main file with two subroutines ,but the window always show me Error using load Number of columns on line ...

6ヶ月 前 | 1 件の回答 | 0

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質問


Is there any instruction can ignore the "0" value and find the minimum value of a matrix ?
Is there any instruction can ignore the "0" value and find the minimum value of a matrix ? I mean ,if i assume A=[0 1 2 3] How...

7ヶ月 前 | 1 件の回答 | 0

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質問


Why will window show me "Improper assignment with rectangular empty matrix" sometimes?
Why will window show me "Improper assignment with rectangular empty matrix" sometimes? It seems this error should tell me ,the...

7ヶ月 前 | 0 件の回答 | 0

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回答済み
Why are the values ,the result of rho_k, are the same?it shouldn't be the same
The original code is like this bdc=4 lkk=1:bdc %lkk=1, 2, 3, 4 lkkspace=zeros(1,bdc) % for rho_k=0:0.2:0.6 code A ...

7ヶ月 前 | 0

| 採用済み

質問


Why are the values ,the result of rho_k, are the same?it shouldn't be the same
First, i introduce the code A, this code A can help me find the minimum value when the rho_k=0.6, and the loop does the code for...

7ヶ月 前 | 2 件の回答 | 0

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質問


why does the window show me x3=27 when x3=1:2:50?
I wrote this code ,and the c3 can be a vector ,the elements in this vector is the result of every loops,however,i found that the...

7ヶ月 前 | 1 件の回答 | 0

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質問


I have improve the code for mean some element,some of them are inf, in a for loop,however,the window show me an error
rho_k_up=[0:0.1:1] ad = [] for cyclew=1:length(rho_k_up) bd=10 for dd=1:bd %%%%%%%%%%%%%%%%%%%%%%%%%%%%...

7ヶ月 前 | 0 件の回答 | 0

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質問


combine for loop and ~isinf,but there is an error in every loops except the result in the first loop
I use ~isinf and a for loop to make a code,in this code ,i want to let the un-Inf value to show me in each loop,however,i found ...

7ヶ月 前 | 1 件の回答 | 0

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質問


How can i know what is the n when the nth is the smallest or biggest
How can i know what is the n when the nth is the smallest or biggest,for example A=[10 2 3 4 50] mimn=min(A) I can use the mi...

7ヶ月 前 | 2 件の回答 | 0

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質問


Why does it seem that the ~isinf(cvx_optval) and co( ~isinf(cvx_optval)) are both not work
I write a code to produce cvx_optval,however,in some result of the loop is inf,so i use the "~isinf" to know how many value is n...

7ヶ月 前 | 1 件の回答 | 0

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質問


Can we sum a series of values,even some of them are "Inf"?If i want to do it,how can i do?
I get a series answer of optimal problem in several times,and i want to sum of them and average them,however, some of them are "...

7ヶ月 前 | 1 件の回答 | 0

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