Multiple left-hand sides must be separated by commas

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Postit123
Postit123 2020-9-18
评论： Stephen23 2020-9-18
Hello
When I execute my code, the error message keeps popping up, "Multiple left-hand sides must be separated by commas" .
I don't know what to do to fix it.
I really thank you for your help!
for i = 1:10
EP(1,:)=EP1;
while abs(EP(i+1,:)-EP(i,:)) > 0.1 ; %[m]
t0(1) = ice;
for j = 1:4
a(j) = EP(i,1) - s(j,1); % X_total - X_satellite
b(j) = EP(i,2) - s(j,2); % Y_total - Y_satellite
c(j) = EP(i,3) - s(j,3); % Z_total - Z_satellite
R_t(j) = sqrt(a(j)^2+b(j)^2+c(j)^2); % R_total
PSR(j) = R_t(j) + c*t0(i);
end
Mat1(i) = [[a b c]./R_t c];
Mat2(i) = [PSR-R_t];
[dx(i); dy(i); dz(i); t0(i)] = inv(Mat1(i))*Mat2(i);
EP(i+1,1) = EP(i,1) + dx(i);
EP(i+1,2) = EP(i,2) + dy(i);
EP(i+1,3) = EP(i,3) + dz(i);
t0(i+1) = t0(i);
end
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Postit123
Postit123 2020-9-18
Thank you very much. I modify them!
Now I have other error, Index in position 1 exceeds array bounds (must not exceed 1) for this line. Could you explain what the problem is?
while abs(EP(i+1,:)-EP(i,:)) > 0.1
Stephen23
Stephen23 2020-9-18
"Could you explain what the problem is?"
You are trying to access a row of EP that does not exist.
Look at the size of EP:
size(EP)
and the value of i+1:
disp(i+1)
Does EP have an i+1 row?

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Walter Roberson
Walter Roberson 2020-9-18
[dx(i); dy(i); dz(i); t0(i)] = inv(Mat1(i))*Mat2(i);
You need to use comma instead of semicolon there.
But it is not going work. You need to assign the result to a variable and then index the variable to pull out parts to assign to those variables.
You are also going to need to start using cell arrays for Mat1 and Mat2
Is there a reason that you are storing the Mat1 and Mat2 results? You do not appear to be using them after the loop.

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