@Markiyan Hirnyk 

many thanks. you enlightened me in this

@acer 

thanks. I found it has name Hadamard product of matrices and I could not find the command using help

thanks al lot

@Carl Love 

thanks

Hi Georgios,

Thanks for your help. Your recommendation is very good and I used it as workaround and was capable to reach the desired result.

However, something wrong with the plot assistant in Maple 11. But this is another story.

Thanks anyway.

Mark.

Hi Georgios,

Thanks for your help. Your recommendation is very good and I used it as workaround and was capable to reach the desired result.

However, something wrong with the plot assistant in Maple 11. But this is another story.

Thanks anyway.

Mark.