I guess it is a simple question, I am doing simple while iteration and want to save data within data array so I can simple plot it.
tr = 25 #sec
fr = 50 #Hz
dt = 0.002 #2ms
df = fr*(dt/tr)
i=0;
f = 0
data = 0
while(f<50):
i=i+1
f = ramp(fr,f,df)
data[i] = f
plot(data)
How to correctly define data array? How to save results in array?
One possibility:
data = []
while(f<50):
f = ramp(fr,f,df)
data.append(f)
Here, i is no longer needed.
you could initialize a list like this:
data=[]
then you could add data like this:
data.append(f)
data.append(i) = f. You probably want to use something like aix's data.append(f).
data.append(f)
For plotting matplotlib is a good choice and easy to install and use.
import pylab
pylab.plot(data)
pylab.show()
He needs "i" b/c it starts from 1 in the collection. For your code to work use:
data = {} # this is dictionary and not list
data[i] = f would be an acceptable way to index a data array if it had been initialized with something like data=[0.0]*1000.