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Index › Programming Questions & Help › Syntax Questions › Import string from csv and then turning into int
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Import string from csv and then turning into int (Read 2247 times)
jacques_ct
Import string from csv and then turning into int
May 19th, 2010, 2:19pm  
Hi,
I'm having some issues trying to import some values from a csv file and turn them into int values.
Does anyone know any way I'd be able to do it?
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Cedric
Re: Import string from csv and then turning into int
Reply #1 - May 19th, 2010, 2:26pm  
Integer.parseInt(String)
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Rapatsk1
Re: Import string from csv and then turning into int
Reply #2 - May 19th, 2010, 3:00pm  
why not just int(String)?
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Cedric
Re: Import string from csv and then turning into int
Reply #3 - May 19th, 2010, 3:10pm  
true, processing does it by itself.
i guess i was confused by the question and thought of a more complicated answer than that.
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jacques_ct
Re: Import string from csv and then turning into int
Reply #4 - May 20th, 2010, 12:21am  
what would be the correct syntax to use when using the int(String) method?
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Cedric
Re: Import string from csv and then turning into int
Reply #5 - May 20th, 2010, 12:47am  
that is the correct syntax.

int num = int(String);
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jacques_ct
Re: Import string from csv and then turning into int
Reply #6 - May 20th, 2010, 3:06am  
Still have some problems.

Here's my code:
Code:
String lines[] = loadStrings("list.csv");
int nums = Integer.parseInt("lines");


Which returns this error:
"processing.app.debug.RunnerException: NumberFormatException: For input string: "lines""

I've also tried:
Code:
String lines[] = loadStrings("list.csv");
int i = int(lines);

and
Code:
String lines[] = loadStrings("list.csv");
int i = parseInt(lines);


Both return the same error:
"Cannot convert from int[] to int"

Trying:
Code:
String lines[] = loadStrings("list.csv");
Integer.parseInt(lines);


Gets me this error:
"The method ParseInt(String) in the type integer is not applicable for the arguments (String[])"
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Rapatsk1
Re: Import string from csv and then turning into int
Reply #7 - May 20th, 2010, 3:21am  
String[] lines = loadStrings("lines.csv");
int[] lines_int = new int[lines.length];

for(int i = 0; i < lines.length; i++) {
lines_int[i] = int(lines[i]);
}
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jacques_ct
Re: Import string from csv and then turning into int
Reply #8 - May 20th, 2010, 3:35am  
Thanks Rapatski, that's working a charm.
Only thing now is that the new ints haven't kept their original numbers, they're now either 0 or 1.

/edit. Ignore that, it's just working a charm. Thank you.
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PhiLho 
Re: Import string from csv and then turning into int
Reply #9 - May 20th, 2010, 4:43am  
You were close in your second attempt.
This should work:
Code:
String[] lines = loadStrings("list.csv");
int[] numbers = int(lines);

Although this should work only if there is one number per line. Since you wrote that Rapatski's solution worked, this should work too.
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