Thank you very much for your reply. I am wondering that if I put two
functions in two files (same as Matlab did), does it slow the coding speed?
If not, how can I use variables already defined in one function?
On Thursday, March 24, 2016 at 1:34:08 PM UTC-5, Tim Holy wrote:
>
> We usually talk about calling "functions" rather than "files." If you're
> coming
> from a Matlab background, one thing to note about julia is that you can
> put
> multiple functions in one file:
>
> square_and_mult_by_c(x, c) = c*x*x
>
> smc(X::AbstractVector, c) = [square_and_mult_by_c(x, c) for x in X]
>
> Note the second function calls the first, but you can put both of these in
> the
> same disk file. Once loaded, you can also call either of these functions
> from
> the command line.
>
> Functions can have more than one argument, so you can pass both `x` and
> `c`
> from one function to another. You might also be interested in the manual
> sections on default and keyword arguments.
>
> Best,
> --Tim
>
> On Thursday, March 24, 2016 09:29:16 AM new to Julia wrote:
> > Got it. Thank you so much. I am wondering that what about variable? I
> may
> > need to define it in the function, right? How to make it be called by
> other
> > files?
> >
> > On Thursday, March 24, 2016 at 1:30:26 AM UTC-5, Uwe Fechner wrote:
> > > If c is a constant, that you want to define in the file test.jl, than
> you
> > > can define it e.g. at the top of the file
> > > OUTSIDE of the function like this:
> > > const c=2
> > >
> > > On Thursday, March 24, 2016 at 5:42:24 AM UTC+1, new to Julia wrote:
> > >> Thank you so much for your reply. I am still not very clear about
> what to
> > >> do. Could you explain to me again？
> > >> On Wednesday, March 23, 2016 at 2:48:40 PM UTC-5, Christopher
> Alexander
> > >>
> > >> wrote:
> > >>> No, you can call files using "include", but you are only going to
> > >>> import essentially the functions, types, and global variables
> defined in
> > >>> those files (you should not include a file inside of a function).
> You
> > >>> do
> > >>> see though how your variable "c" in "test" would not be accessible
> > >>> anywhere
> > >>> else, right?
> > >>>
> > >>> Chris
> > >>>
> > >>> On Wednesday, March 23, 2016 at 3:39:10 PM UTC-4, new to Julia
> wrote:
> > >>>> Thanks for your reply. Does it mean that calling files in Julia is
> > >>>> impossible？
> > >>>>
> > >>>> On Wednesday, March 23, 2016 at 1:57:16 PM UTC-5, Christopher
> Alexander
> > >>>>
> > >>>> wrote:
> > >>>>> How is test2 supposed to know what "c" is? It is only defined
> inside
> > >>>>> the scope of the function "test", so it won't be accessible
> anywhere
> > >>>>> else.
> > >>>>>
> > >>>>> Chris
> > >>>>>
> > >>>>> On Wednesday, March 23, 2016 at 2:41:29 PM UTC-4, new to Julia
> wrote:
> > >>>>>> I have a question for calling files in Julia:
> > >>>>>>
> > >>>>>> I have two jl files. And I can call one file from the other file.
> > >>>>>> However, the variable or constant defined in that file cannot be
> used
> > >>>>>> in
> > >>>>>> the other file. I am wondering that how to fix this? The
> following is
> > >>>>>> a
> > >>>>>> simple example.
> > >>>>>>
> > >>>>>> function test(x)
> > >>>>>>
> > >>>>>> c=2;
> > >>>>>> y1=6*x;
> > >>>>>> y2=x/5;
> > >>>>>> y1,y2
> > >>>>>>
> > >>>>>> end
> > >>>>>> pwd()
> > >>>>>>
> > >>>>>>
> > >>>>>> ## test and test2 are used for calling functions in Julia
> > >>>>>> function test2(x)
> > >>>>>>
> > >>>>>> include("test.jl")
> > >>>>>> yold,ynew=test(x/c);
> > >>>>>> y3=yold+10;
> > >>>>>> y4=ynew-10;
> > >>>>>> yold2,ynew2=test(x)
> > >>>>>> y5=yold2+20;
> > >>>>>> y6=ynew2-20;
> > >>>>>> y3,y4,y5,y6
> > >>>>>>
> > >>>>>> end
> > >>>>>> y3,y4,y5,y6=test2(100)
> > >>>>>>
> > >>>>>>
> > >>>>>> However, when I run this test2, there is a error comes out:
> saying
> > >>>>>> that c is not defined.
> > >>>>>>
> > >>>>>> Thank you very much.
>
>
