Timeline for Efficiently initialize list of consecutively named variables for file import
Current License: CC BY-SA 3.0
16 events
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| Jun 20, 2013 at 13:14 | comment | added | bill s |
One major difference is that when you Import using the above code, the imported information is assigned to allFiles[[1]], allFiles[[2]], etc. When you Get, the information is evaluated.
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| Jun 20, 2013 at 12:09 | comment | added | fpghost |
@bills But how is that different to Import? Would Import produce an error instead or something?
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| Jun 20, 2013 at 12:07 | vote | accept | fpghost | ||
| Jun 20, 2013 at 12:02 | comment | added | bill s | If you read in two definitions for the same thing, then you are going to have to be careful which one is in effect (probably the last one read and executed). I don't think there's anything wrong with this, but you need to be careful that subsequent code is using the definitions you think it is using. | |
| Jun 20, 2013 at 11:58 | comment | added | fpghost |
@bills Do you mean if I have two contradictory definitions for, say, f[2] I will hit issues with Get but not Import? What is the behaviour of each in that case? thanks..
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| Jun 20, 2013 at 11:50 | comment | added | bill s |
@fpghost -- if you are going to be reading in definitions then Get might be better, but you also need to be careful about conflicting definitions.
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| Jun 20, 2013 at 11:48 | comment | added | bill s |
@bobthechemist -- I'm not really sure what's in the files, so I added the suggestion of using Get in case this is preferable to Import. Either should work -- this just answers the part about getting all the file names... not what you're going to do with the information after it's read in!
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| Jun 20, 2013 at 11:47 | comment | added | fpghost |
@bobthechemist @bill s I have no idea if using Get is dangerous here? It's just that using Import doesn't seem to set the definitions that I mentioned in the my previous comment.
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| Jun 20, 2013 at 11:45 | comment | added | fpghost |
@bill s Yes, sorry I was being an idiot. I think it did not work the way you had it because of Import vs. Get perhaps. My files contains lots of definitions like f[2]=3.4234324, f[3]=3.35555533,.... etc and using Import for some reason did not set these in the workbook like normal, but when I changed to Get things are defined..
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| Jun 20, 2013 at 11:44 | comment | added | bobthechemist |
Based on the variable names used by the OP, should Import be used instead of Get? It seems to me that unless the logfile has commands to be executed, Get should be avoided in this case.
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| Jun 20, 2013 at 11:41 | history | edited | bill s | CC BY-SA 3.0 |
added 333 characters in body
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| Jun 20, 2013 at 11:36 | comment | added | bill s |
You misunderstand how it works, I think. This reads the names of all files (in the specified directory) that have the extension ".txt" and places these names in a list called fileNames. Then you read in the files from this list. They can be be named anything at all, as long as they have the specified extension.
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| Jun 20, 2013 at 11:27 | comment | added | fpghost |
Thanks, this works if you just have files called 0,1,2,3... and change the code as: fileNames = FileNames["*", path]; allFiles = Table[Import[fileNames[[num]]], {num, 1, Length[fileNames]}]; but not otherwise as the files are not just named by numbers. Is there a way to concatonate ".txt" onto num when you do the final read in?
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| Jun 20, 2013 at 11:06 | history | edited | bill s | CC BY-SA 3.0 |
added 117 characters in body
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| Jun 20, 2013 at 10:18 | history | edited | bill s | CC BY-SA 3.0 |
added 77 characters in body
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| Jun 20, 2013 at 9:59 | history | answered | bill s | CC BY-SA 3.0 |