On Mon, Nov 30, 2009 at 1:34 PM, Nyiro Gergo <gergo.nyiro@gmail.com> wrote:
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<http://groups.google.com/group/boost-list/browse_thread/thread/b491f5eb8cc836c5?hide_quotes=no#msg_a69011d99e445aef>
On Mon, Oct 12, 2009 at 7:09 AM, Pim Schellart <p.schell...
<http://groups.google.com/groups/unlock?_done=/group/boost-list/browse_thread/thread/b491f5eb8cc836c5&msg=a69011d99e445aef>@gmail.com>
wrote:
Hi Everyone,
I tried to find a good example for this but after spending two days on
google and one day getting pyublas to compile I decided to call for
help.
I want to give a numpy ndarray as an argument to a c++ method,
calculate something and return the output as an ndarray to Python.
I would prefer not to use another library (such as PyUblas) for this
so I do not have to add another dependency to my program.
Since the latest information on boost python is quite outdated (uses
numeric) I would like to know the following.
1. Is boost python still maintained or should I switch to another tool.
2. Is numpy supported, and if so,
3. can someone give me a basic example of how to use it.
1. Yes, Boost.Python is still maintained and works find.
2. Yes, Boost.Python supports any and all libraries that communicate
through python, you would just use the ndarray just like any other
Python Object.
3. Give an example of how you use it in Python and we can give you an
example of how you would do it from the C++ side, it is a pretty
direct 1-to-1 mapping (have you gone through the Boost.Python
tutorials and documentation yet?).
Hello,
I read that post above on Boost-users mailing list, but I have no permission
required to post. To answer to the 3. point could you give me an example how
to solve this python code snippet in C++:
parser = cParser('FileName') # that would be the C++ class (already
implemented)
TimeAndSignal = parser.getSignal('SignalName') # and this the
questionable member function
type(TimeAndSignal)
<type, 'list'>
len(TimeAndSignal)
2
type(TimeAndSignal[0])
<type, 'ndarray'>
type(TimeAndSignal[1])
<type, 'ndarray'>
import pylab
pylab.plot(TimeAndSignal[0], TimeAndSignal[1]); pylab.show()
Time, Signal = parser.getSignal('SignalName') # and this must work too
pylab.plot(Time, Signal); pylab.show()
Thanks for your help in advance.
You should forward this to the Boost list. I am not home right now so
cannot give a good example, so you would probably get a much better
example from there. I am forwarding this response back to the Boost
list. If I notice this later when I have free time, I will come up
with examples for the above, but it really is very simple, should look
at the examples included with Boost.Python.
OvermindDL1