error when using mvncdf

I am using mvncdf. Here is my code

xl=[-Inf,-Inf,-c1,-Inf,c0,-Inf,-Inf,-Inf,0];

xu=[-c1,Inf,c1,Inf,Inf,Inf,0,Inf,Inf];

mu=zeros(1,9);

sig is a 9 by 9 symmetric and positive definite matrix (checked that sig==sig')

When I tried to run

err=mvncdf('xl',xl,'xu',xu,'mu',mu,'SIGMA',sig);

an error msg popped out "Error using mvncdf (line 109) XL and XU must be matrices and have the same size.

Error in prob_err_gq_b (line 53) err=mvncdf('xl',xl,'xu',xu,'mu',mu,'SIGMA',sig);"

However I checked that EDU>> size(xl)

ans =

     1     9

EDU>> size(xu)

ans =

     1     9

what is the problem?

Answer 1

[the cyclist]

Don't put quotes around the variable names in the inputs.