Conversion to double from memmapfile is not possible

Dear experts,

I keep getting the error message, "Conversion to double from memmapfile is not possible." Could anyone please suggest a solution?

Please see below for the relevant bit.

**********************************************

>> Y=SurfStatReadData( [thickfileleft, thickfileright] );
248 x 2 files to read, % remaining: 100 90 81 71 61 52 42 32 23 13 3 Done

data =

      Filename: '/home/AAA/SurfStat/tp2fe01f69_6976_48ca_8574_a189843e46f1'
      Writable: true
        Offset: 0
        Format: {'single' [81924 248] 'Data'}
        Repeat: Inf
          Data: 1x1 struct array with fields:
               Data

>> meanthick = mean( double( Y ) );
??? Error using ==> double
Conversion to double from memmapfile is not possible.

**********************************************

Please note that "SurfStatReadData" is one of the scripts of SurfStat http://www.math.mcgill.ca/keith/surfstat/.

Thank you very much for taking the time to read my query. I would much appreciate any help.

Best wishes,

Kie Woo

Answer 1

[Walter Roberson]

Try mean(double( Y.Data.Data ))

[Kie Woo]

Thank you very much! That worked!

[Kie Woo]

Dear Walter Roberson,

Thank you very much again for your answer. May I ask for a further solution, though?

The dimension of the variable seems to be 81924 x 248, and the solution you suggested has produced 248 means.

But, would it be possible to get 81924 means as well?

I appreciate your considering my request again. I would be very grateful for your further help.

Kie Woo

[Walter Roberson]

mean(double( Y.Data.Data ), 2)

[Kie Woo]

Thank you so much again. It worked!