Error in the for loop of my function

조회 수: 1 (최근 30일)
Athira T Das
Athira T Das 2022년 6월 23일
답변: Sai Charan Sampara 2022년 6월 23일
I am trying to plot the given function :
clear all
clc
syms z
syms s1 s2 m1 m2 j1 j2
w = 0.02;
M=1;
b=0.1;
z=linspace(-0.1,0.1);
for m1=0:M
for m2=0:M
for s1=0:m1/2
for j1=0:m1-2*s1
for s2=0:(M-m1)/2
for j2=0:M-m1-2*s2
A1=symsum(factorial(M)/(factorial(m1)*factorial(M-m1))*(1i)^(M-m1),m1,0,M);
A2=symsum(factorial(M)/(factorial(m2)*factorial(M-m2))*(-1i)^(M-m2),m2,0,M);
A3=symsum(((-1)^(s1)*factorial(m1))/(factorial(s1)*factorial(m1-2*s1))*(2*1i)^(m1-2*s1),s1,0,m1/2);
A4=symsum((1/(2*1i))^(m2+j1),j1,0,m1-2*s1)*(exp(2*b*z))*hermiteH(m2+j2,(1+(1i*b/2*w)));
A5=symsum(((-1)^(s2)*factorial(M-m1))/(factorial(s2)*factorial(M-m1-2*s2)*(2*1i)^(M-m1-2*s2)),s2,0,(M-m1)/2);
A6=symsum((1/(2*1i))^(M-m2+j2),j2,0,M-m1-2*s2)*(exp(2*b*z))*hermiteH(M-m2+j2,(1-(1i*b/2*w)));
W=A1*A2*A3*A4*A5*A6
end
end
end
end
end
end

답변 (2개)

Walter Roberson
Walter Roberson 2022년 6월 23일
The second parameter to symsum must be a scalar symbolic variable that will be summed over. However in your code, the second parameter is a numeric variable (assigned by your for loops)
It looks to me as if none of those for loops should be present.

Sai Charan Sampara
Sai Charan Sampara 2022년 6월 23일
You seem to have used both a for loop and symsum function. The symsum function already runs a loop based on the index and range given as inputs.The first input of symsum must be a function of a variable(syms data type). Refer to the following link for more details on the symsum function:

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