I have a set of numbers in notepad that I want to import into Mathematica as a list. I could do this manually, but it will take forever, and my hands are getting tired. My issue is that I’m trying to get these numbers into mathematica, but when I copy and paste everything into mathematica, there are multiplication symbols in between the spaces. Aside from having to delete all those symbols, I would have to also add commas. There are a lot numbers and it isn’t practical.

I would like the end result to look like this (using arbitrary numbers):{310,8,597,15,898,6,700,894,7,175,170,2,1673,2,967,3,158,10,6,1095,12,5,193,97,163}

EDIT: I was able to import the raw data (without any multiplication symbols). All I did was call Import[(file path here)].

It looks sort of like this now (sample data using arbitrary numbers):

43 454 757 34 90

34 74 43 86 23

34 65 03 54 51

65 6 52 64 54

54 65 74 54 50

Now I just need to turn this numbers into a list.

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– dionys

Jun 7 at 13:10

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– Louis

Jun 7 at 14:07

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3 Answers

3

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Make some sample data consisting of numbers and spaces:

samepleData = Module[{seed = ToString@Table[RandomInteger[{0, 10000}], 50]},

StringReplace[seed, {“{” -> ” “,

“}” -> ” “,

“,” -> RandomChoice[{” “, ” “, ” “}]}]]

(* 7476 8829 1505 3337 7282 7244 6783 3389 7608 7031 4033 1579 4323 1695 2325 1821 9879 4811 5464 563 7065 8359 8860 8119 3434 8838 6348 9036 8166 2467 2939 4287 7551 2184 4126 9049 8925 5883 1863 9815 7154 2806 3746 9096 7972 3188 4174 8206 9813 1281 *)

Mathematica’s built-in import functions can handle this format directly:

ImportString[samepleData, “Words”]

(*{7476,8829,1505,3337,7282,7244,6783,3389,7608,7031,4033,1579,4323,1695,2325,1821,9879,4811,5464,563,7065,8359,8860,8119,3434,8838,6348,9036,8166,2467,2939,4287,7551,2184,4126,9049,8925,5883,1863,9815,7154,2806,3746,9096,7972,3188,4174,8206,9813,1281}*)

If your input is a file, you can use Import instead of ImportString. Note that they work the same way with exactly the same element specifications and options.

Also, spaces normally mean multiplication in Mathematica syntax. This may be why you see “multiplication symbols in between the spaces” with some import methods when numbers separated by spaces are interpreted as an expression.

Awesome! This worked, thank you.

– physicsmajor

Jun 7 at 13:53

Szabolcs HorvÃ¡t has a great bit of code that makes bring in tabular data via copy and paste super easy:

Pasting tabular data from the web

http://szhorvat.net/pelican/pasting-tabular-data-from-the-web.html

I cut and paste the numbers you have to a .csv file, importing them and was left with the numbers in Text format. Try this.

ToExpression[Flatten[StringSplit[Flatten[Import[“C:\\File.csv”]]]]]

It flattens and converts it to a expression, numbers instead of text format.