Error: The input character is not valid in MATLAB statements or expressions.
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Nugroho Permata Putra
le 2 Mar 2016
Commenté : Steven Lord
le 5 Jan 2021
Hi, i have an error when i try to run this
t=-2:.1:5;
x=3*exp(0.4*t);
y=2*exp(-0.9*t);
plot(t,x,t,y,':');
legend('x(t)','y(t)')
i'm new to matlab, please help ASAP :( ps : i'm using matlab r2012b
6 commentaires
Jan
le 2 Mar 2016
Modifié(e) : Jan
le 2 Mar 2016
I've formatted your code. Please read: http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup. Thanks.
And if you copy and paste this code in the command window, you get the same error?
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Jan
le 2 Mar 2016
Modifié(e) : Jan
le 2 Mar 2016
The error message seems to tell, that the equal character "=" is not valid. How strange. Perhaps it is the space behind the =, which is a backspace charcter '\b' ?!
The code looks okay. How did you insert it to the command window? Simply try to type it again.
What is in the line above? Perhaps a continuation '...' and you've added the ">>" manually? I admit, this is wild guessing.
Plus de réponses (2)
Kaya Wydler Cunningham
le 5 Jan 2017
Modifié(e) : Walter Roberson
le 5 Jan 2017
The input character is not valid in MATLAB statements or expressions.
Error in lv (line 11)
[t,y] = ode45(@lvfun,[0 200],[1 1]); % solve ODE system over
Unsure as to what this means?
2 commentaires
Steven Lord
le 5 Jan 2017
One or more of the characters in that expression (or perhaps inside lvfun) should be underlined in red in the Editor. If it is, tell us which one it is; copy and paste it between the single quotes in the following command; and tell us what MATLAB displays when you execute that command.
double('')
My suspicion is that you copied and pasted the code from something (Microsoft Word® for instance) that tries to be "nice" with its formatting. [The most common culprit is the "smart quote".]
Jan
le 5 Jan 2017
@Kaya: Please do not post a new question in the section for answers, but open a new thread. Then post the complete error message. It seems like the most interesting part is missing.
Ahmed Makhlas
le 4 Jan 2021
j'ai une erreur au niveau de la fonction imhist quelq'un qui aide moi
img=imread('lena1.png');
subplot(1,2,1);
imshow(img)
img=rgb2gray(img);
subplot(1,2,2)
imhist(img) %???????????????????????????
Error: File: imhist.m Line: 1 Column: 1
The input character is not valid in MATLAB statements or expressions.
1 commentaire
Steven Lord
le 5 Jan 2021
First, I want to check whether you're calling the imhist.m included in Image Processing Toolbox or you're calling an imhist.m that you created or downloaded. What does this command display?
which -all imhist
If you're using the imhist function from Image Processing Toolbox, I want to check that you haven't accidentally modified it. What does this command display?
dbtype 1:1 imhist.m
Which release of Image Processing Toolbox are you using?
ver images
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