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Topic: Export Import Array
Replies: 1   Last Post: Jul 18, 2013 2:43 AM

 Bob Hanlon Posts: 906 Registered: 10/29/11
Re: Export Import Array
Posted: Jul 18, 2013 2:43 AM

One way:

steps = {.05, .1, .2, .25};

{dx, dy, dz} = Table[RandomChoice[steps], {3}]

{0.2, 0.05, 0.1}

vectors = Table[{x, y, z},
{x, -1, 1, dx},
{y, -1, 1, dy},
{z, -1, 1, dz}];

dim = Dimensions[vectors]

{11, 41, 21, 3}

Export["vectors.csv", Flatten[vectors, 2]];

vectors2 = Fold[Partition[#1, #2] &,
Import["vectors.csv"],
dim // Most // Rest // Reverse];

vectors == vectors2

True

Bob Hanlon

On Wed, Jul 17, 2013 at 1:50 AM, graser <graser@gmail.com> wrote:

> Dear Mathematica Users!
>
> I have a question for you about Exporting and Importing array.
> Let's say there is a array (or vector) like,
> vectors =
> Table[{x, y, z}, {x, -1, 1, .25}, {y, -1, 1, .25}, {z, -1, 1, .25}];
>
> If I export vectors as "XLS" format and import the XLS file,
> TT= Import["vector.xls", "XLS"];
>
> Some funny thing happen like
> TT[[1, 1, 1]] should be {-1,-1,-1} so that If I do TT[[1, 1, 1,1]] , it
> should give -1.
>
> But instead of that, TT[[1, 1, 1]] gives a string as "{-1., -1., -1.}" .
>
> If I export vectors as "Table" format and import the table file,
> TR= Import["vector.data", "Table"];
> It gives something like.. {"{{-1.,", "-1.,", "-1.},",.... All double
> comma.
>
>
> Do you know how to properly export vector (or array) ?
>
> And if I import string instead of vecotor like TT, How to convert TT like
> string to array?
> "{-1., -1., -1.}" -> {-1,-1,-1}
>
> Thanks!
>
>
>
>