Invalid expression. Check for missing or extra characters.

154 vues (au cours des 30 derniers jours)
Jonas Damsbo
Jonas Damsbo le 19 Nov 2018
Hi
When I run my code I got an error message "Invalid expression. Check for missing or extra characters" for my if loop.
I am not sure why. Someone there can help me?
GHGS = (zx(:,[151+[-1 0 1]])-zx(:,[131+[-1 0 1]]))/20;
GHGN = (zx(:,[171+[-1 0 1]])-zx(:,[151+[-1 0 1]]))/20;
for i=1:nx
if
GHGS > 0
fprintf('The point is blocked')
elseif
GHGN < -10
fprintf('The point is blocked')
else
blocks(i)=blocks(i)+1;
end
end
  1 commentaire
Adam
Adam le 19 Nov 2018
Modifié(e) : Adam le 19 Nov 2018
At a guess I would say it comes from splitting your if condition across 2 linies, though I haven't tested it.
Try
if GHGS > 0
all on one line instead.
You can split code across multiple lines, but it need the first line to end with ... to show that the same statement continues on the next line, otherwise Matlab will expect a complete statement on the first line.

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Réponse acceptée

madhan ravi
madhan ravi le 19 Nov 2018
Modifié(e) : madhan ravi le 19 Nov 2018
GHGS = (zx(:,[151+[-1 0 1]])-zx(:,[131+[-1 0 1]]))/20;
GHGN = (zx(:,[171+[-1 0 1]])-zx(:,[151+[-1 0 1]]))/20;
for i=1:nx
if GHGS > 0 %change your lines to this as one line
fprintf('The point is blocked')
elseif GHGN < -10 %change your lines to this as one line
fprintf('The point is blocked')
else
blocks(i)=blocks(i)+1;
end
end

Plus de réponses (6)

KALIVARAPU Rama Kumara Teja
KALIVARAPU Rama Kumara Teja le 11 Déc 2019
Modifié(e) : KALIVARAPU Rama Kumara Teja le 11 Déc 2019
The equation is in .mlx file and I saved as .m file to paste the code(syntex) for .mfile execution. facong below error :
% Mutual Inductance
g = 1.3 ; % constant value for square shape.
n1 = 5 ; % number of turns in primary coil
n2 = 4 ; % number of turns in secondary coil
r_i = % radius of ith turn in primary coil
r_j = % radius of jth turn in secondary coil
d_12 = 30 ; % distance between coils,mm
M=g\sum_{i=1}^{n1}\sum_{j=1}^{n2}(M_ij,r_i,r_j,d_12)
> squarecoil
Error: File: squarecoil.m Line: 53 Column: 44
Invalid expression. Check for missing or extra characters.
Can someone help me for the above equation ?
  1 commentaire
Adam
Adam le 11 Déc 2019
Modifié(e) : Adam le 11 Déc 2019
sum_{i=1}
is not valid syntax. At least I'm pretty sure it isn''t!

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swapna subudhiray
swapna subudhiray le 2 Oct 2020
clear
close all
clc
load X_Gabor_feat
load Y
X=X_Gabor_feat;
clear X_Gabor_feat
for i=1:10
per=70;
c=cvpartition(Y,'HoldOut',1-(per/100));
train_loc=c.training;
test_loc=~train_loc;
X_train=X(train_loc,:);
Y_train=Y(train_loc,:);
X_test=X(test_loc,:);
Y_test=Y(test_loc,:);
Mdl=fitcknn(X_train,Y_train);
[obt_class,~]=predict(Mdl,X_test);
[oa(i), aa(i), K(i), ua(:,i)]=perf_measure(Y_test,obt_class);
end
disp('OA : mean std');
[mean(oa);std(oa)]
disp('AA : mean std');
[mean(aa);std(aa)]
disp('K : mean std');
[mean(K);std(K)]
disp('UA :');
mean(ua')
getting invalid erroe expression..please help me out

sudirman
sudirman le 26 Juil 2023
blinking
Error: File: blinking.m Line: 2 Column: 11
Invalid expression. Check for missing or extra characters.

sudirman
sudirman le 26 Juil 2023
blinking
Error: File: blinking.m Line: 2 Column: 11
Invalid expression. Check for missing or extra characters.

sudirman
sudirman le 26 Juil 2023
>> blinking
Error: File: blinking.m Line: 2 Column: 11
Invalid expression. Check for missing or extra characters.

sudirman
sudirman le 26 Juil 2023
>> blinking
Error: File: blinking.m Line: 2 Column: 11
Invalid expression. Check for missing or extra characters.
papan = arduino();
dipimpin =

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