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Dears,
Can anybody please confirm, if we can declare more then three dimensional arrays in Fortran 95 using Silver Frost (Plato) compiler ????
FTN95 conforms to the Fortran 95 Standard which (I think) allows up to 7 dimensions.
Oh, that's a bit limiting. What about the 11-dimensions necessary for the M-theory version of string theory (http://en.wikipedia.org/wiki/String_theory). Drat, we'll just have to use 11 separate arrays of the same length.
Eddie
haha Eddie I think the cold in your shed must be getting to you!
Unfortunately 11 arrays each of size 100 (say) can't store all the elements (100 X 100 .... X 100) = 100**11.
If you have 100 elements in each of 7 dimensions and store double precision values thats about 8*1007/109 Gigabytes or about 800 thousand Gigabytes. :roll:
You limit the size of problems you can 'model' when you go anywhere near 7 dimensions (as Im sure you know 😃 ). I think its a reasonable limit in the Standard. This going up to 15 in Fortran 2008 so we can worry about M theory then.
What I don't understand is why the OP needed to ask this when it would have been easier to compile two lines of code to find the limit.
integer a(1,1,1,1,1,1,1) ! Add/remove dimension to find where a compile error occurs
end
I'm off to PC World to see if they have any punched cards in stock for my Fortran coding.
The shed is the only warm place - must be global warming run riot that has caused this winter.
I stand corrected - but it was not intended to be serious. So we could have around 15 REAL*8s in each of 7 dimensions with FTN95. That 64-bit version is going to be needed real soon now, with the 128-bit version soon after ...
Last time I was in PC World they had card readers, but my cards needed to be folded, spindled or mutilated to get them in the little slot, and I didn't think that was wise.
Eddie