Azzera filtri
Azzera filtri

Invalid text character. Check for unsupported symbol, invisible character, or pasting of non-ASCII characters.

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I really don't know what is the reason for this error. PLease help!
theta_dd(i)= (kP*r(i) +kD*r_dot(i) -(m*g*l+kP)*sin(theta(i)) -kD*theta_dot(i))/M;
  2 Commenti
Walter Roberson
Walter Roberson il 24 Mag 2021
The cause of this kind of problem is having an invisible character such as a zero-width space, or having accidentally used "smart-quotes" instead of regular quotes.

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Risposte (5)

James Browne
James Browne il 10 Apr 2020
Modificato: James Browne il 10 Apr 2020
It is impossible to debug your one line of code because I can't run it on my end due to undefined variables. However, if you copied and pasted that line of code into MATLAB, it is likely that there is some text character(s) in the line that you copied which matlab does not recognize.
If you did copy and paste the code, try typing it in by hand instead. Otherwise you will need to post the whole code before anyone can really help you.
  3 Commenti
Nga Thede
Nga Thede il 10 Apr 2020
The only line it said error is the line I posted above which I don't understand why cause I tried to retyped the whole line already and still saying the same thing.

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Walter Roberson
Walter Roberson il 10 Apr 2020
theta_dd(i)= (kP*r(i) +kD*r_dot(i) -(m*g*l+kP)*sin(theta(i)) -kD*theta_dot(i))/M;
Right after the semi-colon you have char(8203) which us U+200b which is "zero width space".
Put your cursor on the semi-colon and press shift and right arrow several times until your cursor is positioned on the next line. That should highlight several characters. Type in ; and then return. This process should get rid of the zero-width space.

Zeel Dhorajiya
Zeel Dhorajiya il 28 Giu 2021
Modificato: Walter Roberson il 8 Set 2021
A={0.1/2+0.6/3+0.4/4+0.3/5+0.8/6} B={0.5/2+0.8/3+0.4/4+0.6/5+0.4/6} u=input(A); v=input(B);
↑ Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.
Please help me out

Hem Ananth
Hem Ananth il 8 Set 2021
Modificato: Walter Roberson il 8 Set 2021
%Program for linear convolution
%to get the input sequence
n1=input('enter the length of input sequence');
n2=input('enter the length of impulse sequence');
x=input('enter the input sequence');
h=input('enter the impulse sequence');
%convolution operation
y=conv(x,h);
%to plot the signal
subplot(3,1,1);
stem(x);
ylabel('amplitude');
xlabel('n1....>');
title('input sequence')
subplot(3,1,2);
stem(h);
ylabel('amplitude');
xlabel('n2....>');
title('impulse signal')
subplot(3,1,3);
stem(y);
ylabel('amplitude');
xlabel('n3');
disp('the resultant signal is');y
  4 Commenti

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Pyetra
Pyetra il 14 Giu 2024
Error: Invalid text character. Check for unsupported symbol, invisible character, or pasting of non-ASCII
characters.
Alguém pode me ajudar?
  1 Commento
DGM
DGM il 15 Giu 2024
The error message tells you exactly what the problem is and which character to fix. Fix it.
If it's the dash character, replace it with a regular 0x002D hyphen-minus.
Nobody can be certain of which type of dash character that is since you posted a screenshot. Likewise, nobody can know if there are other invalid or invisible characters hidden in your code.

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