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  • Qwt setAxisScale() seems to lock up application when given numbers with greater precision than 2e-07

    - by Dane Larsen
    I'm using Qwt for some scientific graphing, and I'm working with some fairly small numbers, the smallest being around 1.0e-22. I'm trying to call setAxisScale(xaxis, xmin, xmax) //xmin = 0, xmax = 2.0e-10 But when I do, the application locks up. I haven't found anything in the documentation that refers to a minimum value. Xmin and xmax are both doubles, so that shouldn't be a problem. Is this a bug in Qwt, or am I doing something wrong? Thanks in advance

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  • Sorting numbers in string format with Python

    - by prosseek
    I have a list that has some chapter numbers in string. When I sort the keys using keys function, it gives me wrong results. keys = ['1.1', '1.2', '2.1', '10.1'] keys.sort() print keys ['1.1', '1.2', '10.1', '2.1'] How can I use the sort function to get ['1.1', '1.2', '2.1', '10.1'] What if the array has something like this? ['1.1.1', '1.2.1', '10.1', '2.1'] - ['1.1.1','1.2.1','2.1','10.1']

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  • Qwt setAxisScale() locks up application when given numbers less than 2e-07 and greater than 0

    - by Dane Larsen
    I'm using Qwt for some scientific graphing, and I'm working with some fairly small numbers, the smallest being around 1.0e-22. I'm trying to call setAxisScale(xaxis, xmin, xmax) //xmin = 0, xmax = 2.0e-10 But when I do, the application locks up. I haven't found anything in the documentation that refers to a minimum value. Xmin and xmax are both doubles, so that shouldn't be a problem. Is this a bug in Qwt, or am I doing something wrong? Thanks in advance

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  • ORDER BY letters and not numbers of a field

    - by Jon
    Is there a way to order mysql results by the first letter and ignore numbers? For example, I have a list of addresses: 123 Main Street 456 Second Street 234 Third Street and I want to order by the street name and ignore the street number. Is there an easy way to do this?

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  • How do I format Int32 numbers?

    - by Mendy
    What is the best way to get formatted Int32 numbers? Let say I have this o function: string o(int x); This is the value that o need to return according to x x = 0 => o = 00 x = 1 => o = 01 x = 5 => o = 05 x = 10 => o = 10 x = 31 => o = 31 x = 106 => o = 106

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  • Creating a list of lists with consecutive numbers

    - by Henrik
    I am looking for a convenient way to create a list of lists for which the lists within the list have consecutive numbers. So far I only came up with a very unsatisfying brute-typing force solution (yeah right, I just use python for a few weeks now): block0 = [] ... block4 = [] blocks = [block0,block1,block2,block4] I appreciate any help that works with something like nrBlocks = 4.

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  • Encoding arbitrary data into numbers?

    - by Pekka
    Is there a common method to encode and decode arbitrary data so the encoded end result consists of numbers only - like base64_encode but without the letters? Fictitious example: $encoded = numbers_encode("Mary had a little lamb"); echo $encoded; // outputs e.g. 122384337422394237423 (fictitious result) $decoded = numbers_decode("122384337422394237423"); echo $decoded; // outputs "Mary had a little lamb"

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  • regex to match letters, numbers, certain symbols

    - by Hintswen
    I need to validate a username in php, it can be: Letters (upper and lower case) Numbers Any of these symbols :.,?!@ up to 15 characters OR 16 if the last character is one of the following #$^ (it can also be 15 or less with one of these 3 characters at the end only) How do I do this?

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  • Prepending character N followed by line numbers

    - by Denis
    Hi, I'm hand editing CNC Gcode text files and need a way to reference locations in the file and on the toolpath. I want to modify each line in the text file so that it begins with the the upper case N character followed by line numbers which increment in tens for every successive line, then a whitespace,followed by the original text file. Can I do this in vi?

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  • SQL: how to get the left 3 numbers from an int

    - by dmr
    I want to retrieve the left 3 numbers from an integer to be stored in a table. For example, if the int is 1234567, I want to retrieve 123. I want the second number (123) to also be an int; I don't want to convert anything to a string. (And yes, really I should be working with strings. But I don't have control over that aspect of the issue.) Thank you!

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  • regular expression for letters, numbers and - _ .

    - by Jorre
    I'm having trouble checking in PHP if a value is is any of the following combinations letters (upper or lowercase) numbers (0-9) underscore (_) dash (-) point (.) no spaces! or other characters a few examples: OK: "screen123.css" OK: "screen-new-file.css" OK: "screen_new.js" NOT OK: "screen new file.css" I guess I need a regex for this, since I need to throw an error when a give string has other characters in it than the ones mentioned above.

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  • getting numbers from lines of text

    - by Flethuseo
    Hi everyone, I want to parse a text file, where I get numbers that are between parenthesis like this: 1 2 3 (4 - 7) 8 9 1 3 8 (7 - 8) 2 1 1 2 (8 - 10) 3 2 should return an array for each: array1: 4 7 8 array2: 7 8 10 I am thinking of using split for each line, like line.split("("), but that doesn't quite doing the trick.. I was wondering if there is something more sophisticated for the job. Any help appreciated, Ted

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