Re: [Numpy-discussion] arr.dtype.kind is 'i' for dtype=unit !?
Hi,
It's in the array interface specification:
http://numpy.scipy.org/array_interface.shtml
I was interested in the 't' (bitfield) type - is there an example of
usage somewhere?
In [13]: dtype('t8')
---
exceptions.TypeError Traceback (most
recent call last)
/home/mb312/python/ipython console
TypeError: data type not understood
Best,
Matthew
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Re: [Numpy-discussion] arr.dtype.kind is 'i' for dtype=unit !?
Matthew Brett wrote: Hi, It's in the array interface specification: http://numpy.scipy.org/array_interface.shtml I was interested in the 't' (bitfield) type - is there an example of usage somewhere? No, It's not implemented in NumPy. It's just part of the array interface specification for completeness. -Travis - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion
[Numpy-discussion] arr.dtype.kind is 'i' for dtype=unit !?
Hi, What are the possible values of arr.dtype.kind ? It seems that signed and unsigned are considered to be the same kind arr=N.arange(10,dtype=N.uint) arr.dtype.kind 'i' arr.dtype.itemsize 8 (OK - this is just showing off our amd64 linux ;-) ) How can I distinguish signed from unsigned without having to list all possible cases explicitly ? Thanks, Sebastian Haase - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion
Re: [Numpy-discussion] arr.dtype.kind is 'i' for dtype=unit !?
Sebastian Haase wrote: Hi, What are the possible values of arr.dtype.kind ? It seems that signed and unsigned are considered to be the same kind arr=N.arange(10,dtype=N.uint) arr.dtype.kind 'i' arr.dtype.itemsize 8 (OK - this is just showing off our amd64 linux ;-) ) How can I distinguish signed from unsigned without having to list all possible cases explicitly ? Hmm This is a problem. There is a 'u' kind for unsigned integers. On my system I get 'u' when running the code you just gave. Can anybody on a 64-bit system confirm? -Travis - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion
Re: [Numpy-discussion] arr.dtype.kind is 'i' for dtype=unit !?
On Tuesday 19 September 2006 14:46, Travis Oliphant wrote: Sebastian Haase wrote: Hi, What are the possible values of arr.dtype.kind ? It seems that signed and unsigned are considered to be the same kind arr=N.arange(10,dtype=N.uint) arr.dtype.kind 'i' arr.dtype.itemsize 8 (OK - this is just showing off our amd64 linux ;-) ) How can I distinguish signed from unsigned without having to list all possible cases explicitly ? Hmm This is a problem. There is a 'u' kind for unsigned integers. On my system I get 'u' when running the code you just gave. Can anybody on a 64-bit system confirm? I'm on 64-bit Debian: In [11]: arr=N.arange(10,dtype=N.uint) In [12]: arr.dtype.kind Out[12]: 'u' In [13]: arr.dtype.itemsize Out[13]: 4 In [14]: arr=N.arange(10,dtype=N.long) In [15]: arr.dtype.kind Out[15]: 'i' In [16]: arr.dtype.itemsize Out[16]: 8 Scott -- Scott M. RansomAddress: NRAO Phone: (434) 296-0320 520 Edgemont Rd. email: [EMAIL PROTECTED] Charlottesville, VA 22903 USA GPG Fingerprint: 06A9 9553 78BE 16DB 407B FFCA 9BFA B6FF FFD3 2989 - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion
Re: [Numpy-discussion] arr.dtype.kind is 'i' for dtype=unit !?
Can anybody on a 64-bit system confirm? I'm on 64-bit Debian: In [11]: arr=N.arange(10,dtype=N.uint) In [12]: arr.dtype.kind Out[12]: 'u' In [13]: arr.dtype.itemsize Out[13]: 4 In [14]: arr=N.arange(10,dtype=N.long) In [15]: arr.dtype.kind Out[15]: 'i' In [16]: arr.dtype.itemsize Out[16]: 8 Ack! That was on the wrong machine (32-bit Debian). Here is the 64-bit version: In [2]: arr=N.arange(10,dtype=N.uint) In [3]: arr.dtype.kind Out[3]: 'u' In [4]: arr.dtype.itemsize Out[4]: 8 In [5]: arr=N.arange(10,dtype=N.long) In [6]: arr.dtype.kind Out[6]: 'i' In [7]: arr.dtype.itemsize Out[7]: 8 Sorry about that, Scott -- Scott M. RansomAddress: NRAO Phone: (434) 296-0320 520 Edgemont Rd. email: [EMAIL PROTECTED] Charlottesville, VA 22903 USA GPG Fingerprint: 06A9 9553 78BE 16DB 407B FFCA 9BFA B6FF FFD3 2989 - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion
Re: [Numpy-discussion] arr.dtype.kind is 'i' for dtype=unit !?
OK - I'm really sorry !! I also get 'u' -- I had a typo there ... But what is the complete list of kind values ? -Sebastian On Tuesday 19 September 2006 11:54, Scott Ransom wrote: Can anybody on a 64-bit system confirm? I'm on 64-bit Debian: In [11]: arr=N.arange(10,dtype=N.uint) In [12]: arr.dtype.kind Out[12]: 'u' In [13]: arr.dtype.itemsize Out[13]: 4 In [14]: arr=N.arange(10,dtype=N.long) In [15]: arr.dtype.kind Out[15]: 'i' In [16]: arr.dtype.itemsize Out[16]: 8 Ack! That was on the wrong machine (32-bit Debian). Here is the 64-bit version: In [2]: arr=N.arange(10,dtype=N.uint) In [3]: arr.dtype.kind Out[3]: 'u' In [4]: arr.dtype.itemsize Out[4]: 8 In [5]: arr=N.arange(10,dtype=N.long) In [6]: arr.dtype.kind Out[6]: 'i' In [7]: arr.dtype.itemsize Out[7]: 8 Sorry about that, Scott - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion
Re: [Numpy-discussion] arr.dtype.kind is 'i' for dtype=unit !?
Sebastian Haase wrote: OK - I'm really sorry !! I also get 'u' -- I had a typo there ... But what is the complete list of kind values ? It's in the array interface specification: http://numpy.scipy.org/array_interface.shtml -Travis - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion
