Issue using the writeVTK.m

hi, I have a file.img, a 3d volume binary file that I want to convert to vtk type format. But when I try to run it I get

??? Undefined function or method 'printf' for input arguments of type 'double'.

Error in ==> writeVTK at 25
printf(fid, '%s\n', '# vtk DataFile Version 3.0');

I'm doing it like this,

path ='/home/matt/Desktop/zzz/data/P450117JG_Macular Cube 512x128_5-4-2009_12-14-32_OS_sn1093_cube_raw.img';

destination = 'vtk';
writeVTK(path, destination);

Answer 1

[Oleg Komarov]

Valid MATLAB functions are fprintf() or sprintf().

edit vriteWTK()

And modify the call to printf into fprintf or sprintf.