Error: The expression to the left of the equals sign is not a valid target for an assignment.
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PUPPALA RAJENDHAR 17PHD0038
am 26 Aug. 2019
Kommentiert: Walter Roberson
am 30 Aug. 2019
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.
5 Kommentare
Walter Roberson
am 29 Aug. 2019
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
Akzeptierte Antwort
Stephen23
am 30 Aug. 2019
Bearbeitet: Stephen23
am 30 Aug. 2019
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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Weitere Antworten (1)
Mahesh Taparia
am 30 Aug. 2019
Bearbeitet: Mahesh Taparia
am 30 Aug. 2019
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 Kommentare
Rik
am 30 Aug. 2019
@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
am 30 Aug. 2019
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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