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declare variables [message #45942]

Tue, 18 October 2005 12:49

qian
Messages: 3
Registered: July 2005

Junior Member

Hi,

I am using FORTRAN and IDL at the same time, so sometime I just assume
some FORTRAN rules when using IDL. I just find out that the variable
type can change within an IDL program, even you declare it to be some
specific type. For example:

data=dblarr(2)

data=[2.3, 3.4]

then now, 'data' is a single precision array.

if I type

data=[2,3]

then it is an integer array.., and data(0)/data(1) = 0 !

I know I should be more careful when programming, always using:

data=[2.3D,4.5D]

But if I read in data from other files, in which '1' actually means
'1.0', is it possible I can re-inforce the array to be certain type (or
let the variables to be certain type throughtout the whole program)? So
even if I type d=1, it is still a real number?

Many thanks,

Qian

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By: qian on Tue, 18 October 2005 12:49

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