When did the syntax for linprog change

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Matt J
Matt J 2024-8-22
评论： Matt J 2024-9-3
At one point, the input syntax for linprog was
x=linprog(f,A,b,Aeq,beq,lb,ub,x0,options)
but now (R2023b) I see that it has changed to,
x = linprog(f,A,b,Aeq,beq,lb,ub,options)
In what release was the support for the first syntax discontinued?

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Naga
Naga 2024-8-22
Hello Matt,
I had the same question and was trying to achieve the same functionality. After some investigation, I discovered that the support for the initial point x0 in the linprog function was removed starting with MATLAB R2023a.
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Matt J
Matt J 2024-8-23
编辑：Matt J 2024-8-23
Were you actually using the intial point x0? By 2022b, the only linear programming algorithms available were interior-point, interior-point-legacy, and dual-simplex, neither of which make use of an initial point.
Matt J
Matt J 2024-9-3
I just got confirmation from Tech Support that " the "x0" input to "linprog" was removed in R2023a."
Thanks a lot.

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Walter Roberson
Walter Roberson 2024-8-23
R2018b documents
X = linprog(f,A,b,Aeq,beq,LB,UB,X0) sets the starting point to X0. This
option is only available with the active-set algorithm. The default
interior point algorithm will ignore any non-empty starting point.
As of R2019a, active-set is not a recognized algorithm

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