CODEWITHSUNDEEP
matlabrandompseudocode
Hardik Shekhaliya
Hardik Shekhaliya

Reputation: 9

MATLAB: The input character is not valid in MATLAB statements or expressions

I am making a Mersenne Generator in MATLAB and I am using the code as follows:

%// Define parameters    
a=65539;    
c=0;    
x0=1;    
m=2^31;

%// Calculate sequence using recursion relation    
xn=zeros(20000,1);

for i=1:20000    
    xn(i)=mod(a*x0+c,m);
    x0=xn(i);    
end

%// Divide by m to give real numbers between 0 and 1    
un=xn/m;

%// Plot 3-tuples of the u_i in 3D space    
plot3(un(1:end-2),un(2:end-1),un(3:end),’b.’);    
xlabel(’u_i’); ylabel(’u_{i+1}’); zlabel(’u_{i+2}’); grid(’on’);

When I run it in my MATLAB, it gives me the following error:

plot3(un(1:end-2),un(2:end-1),un(3:end),’b.’);

Error: The input character is not valid in MATLAB statements or expressions.

Any help would be appreciated.

Upvotes: 0

Views: 510

Answers (1)

rayryeng
rayryeng

Reputation: 104504

The single quotations at the end of the plot code are unicode versions that MATLAB does not accept. This is probably because you copied and pasted the code from Microsoft Word or some other text editor that transformed single quotations into those screwed up characters instead.

Actually use single quotation characters:

plot3(un(1:end-2),un(2:end-1),un(3:end),'b.');    
%//                                     ^  ^
xlabel('u_i'); ylabel('u_{i+1}'); zlabel('u_{i+2}'); grid('on');
%//    ^   ^          ^       ^          ^       ^        ^  ^

Upvotes: 4

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