Error: The expression to the left of the equals sign is not a valid target for an assignment.
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Ycomfort=str2func(strcat('@(x,T_set_r,T_room_m,T_room_mm,DT_m,DT_L,DT_U,T_room,Gt,dc,Q_HVAC,N_slot,T_set_w,dT_L,dT_U,Tw_m,Tw_mm,f_t,G,Bt,Rt,dT_m,T_w,T_env,T_n,Q_CHPU)',Fcomfort));
Error: The expression to the left of the equals sign is not a valid target for an assignment.
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Walter Roberson
2019-8-29
The most common cause for this problem is that you are in the middle of a [ or { matrix definition, that you forgot a ] or } or accidentally commented it out
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Stephen23
2019-8-30
编辑:Stephen23
2019-8-30
As Walter Roberson already wrote, the problem is most likely caused by unmatched curly braces or square brackets earlier in the code. This error is easy to demonstrate, e.g. in a script which mimics your code flow:
baz = @(a,b)a+b;
str = 'baz(a,b);';
vec = {1,2,; % !!! unmatched curly brace !!!
foo = str2func(strcat('@(a,b)',str));
foo(2,3)
which when run throws exactly the error that you are getting:
>> temp5
Error: File: temp5.m Line: 6 Column: 5
The expression to the left of the equals sign is not a valid target for an assignment.
Here is a much simpler demonstration of this error, showing that the error is unrelated to str2func or strcat or functions in particular:
vec = {1,2,; % !!! unmatched curly brace !!!
foo = 23
giving:
>> temp5
Error: File: temp5.m Line: 5 Column: 5
The expression to the left of the equals sign is not a valid target for an assignment.
Solution: check your brackets/braces !
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Mahesh Taparia
2019-8-30
编辑:Mahesh Taparia
2019-8-30
Hi,
You can use the below command:
Ycomfort=str2func('@(x,T_set_r,T_room_m,T_room_mm,DT_m,DT_L,DT_U,T_room,Gt,dc,Q_HVAC,N_slot,T_set_w,dT_L,dT_U,Tw_m,Tw_mm,f_t,G,Bt,Rt,dT_m,T_w,T_env,T_n,Q_CHPU)Fcomfort(varargin)');
Where Fcomfort is the function of the mentioned variables.
You can refer the below link for more help for str2func:
10 个评论
Rik
2019-8-30
@Mahesh can you try to make an example with your syntax that can actually run without errors? Whenever I get questioning comments from other users, I always make sure that the code I'm suggesting runs at least on my system.
Walter Roberson
2019-8-30
You can code
Ycomfort=str2func('@(x,T_set_r,T_room_m,T_room_mm,DT_m,DT_L,DT_U,T_room,Gt,dc,Q_HVAC,N_slot,T_set_w,dT_L,dT_U,Tw_m,Tw_mm,f_t,G,Bt,Rt,dT_m,T_w,T_env,T_n,Q_CHPU)Fcomfort(x,T_set_r,T_room_m,T_room_mm,DT_m,DT_L,DT_U,T_room,Gt,dc,Q_HVAC,N_slot,T_set_w,dT_L,dT_U,Tw_m,Tw_mm,f_t,G,Bt,Rt,dT_m,T_w,T_env,T_n,Q_CHPU)');
but remember that the effect of that would be to index the character vector fcomfort, not execute a function named fcomfort.
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