Re: [Matplotlib-users] continuous plotting..

[<bre...@un...>]

Hello Ray,

There appears to be something wrong with the way "val" is used in the 
first code section (if val==0: val = 0 ?), unless it is modified 
externally somehow?

I would also suggest adding random values or some such to make the test 
data non-periodic, so that it doesn't always look the same.

Best regards,
Brett McSweeney




ray sa <biz...@ya...> 
Sent by: mat...@li...
03/12/2007 09:50 AM

To
mat...@li...
cc

Subject
[Matplotlib-users] continuous plotting..






Hello 

I am trying to use this application to plot a diagram from a log file that 
is always active and storing data. I have written the following and I have 
issues once I touch the figure window it freezes...

from pylab import *
import time
val = 1

while True:
    inData = load('c:\\data.txt')
    x = inData[:,0]
    y = inData[:,1]
    plot(x,y,'o')
    if val == 1:
        show()
    time.sleep(1)
    if val == 0:
        val = 0
    time.sleep(1)
    draw()

I am using the following program to create some dummy data:

import time
import math

def test():
    for i in range(900):
        for rad in sineVal:
            fileData = open('c:\\data.txt','a')
            time.sleep(1) 
            fileData.write('%d' % int(i))
            fileData.write('\t')
            fileData.write('%f' % math.sin(rad))
            fileData.write('\n')
            fileData.close()
            print('*'),

def makeArray():
    tempArray = []
    for i in range(0,360,180):
        tempArray.append(i)
    return tempArray

sineVal = makeArray()

test()

You help and suggestion in the above matter will be most welcomed.

BR /ray


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