Re: [Tutor] Shading Between Curves with Different Colour Over Specified X value Range

[Colin Ross]

On Tue, Jul 28, 2015 at 11:03 AM, Oscar Benjamin oscar.j.benja...@gmail.com
 wrote:

 On Mon, 27 Jul 2015 at 20:53 Colin Ross colin.ross@gmail.com wrote:

 *Goal:* Shade between I_2 (curve 1) and I_3 (curve 2) with following
 conditions:
   - Green for 0  x  4
   - Red for 4  x  12

 *Code: *

 *Note: Code currently only attempting to shade green for 0  x  4 *

 import numpy as np
 import pylab
 from pylab import *
 import matplotlib.pyplot as plt
 import csv


 # Load data from .txt file

 with open('current_mirror_output_swing.csv', 'rb') as f:
reader = csv.reader(f)
your_list = list(reader)

 data = np.asarray(your_list)

 I_ref = np.asarray(data[1:,0])
 I_1 = data[1:,1]
 I_2 = data[1:,2]
 I_3 = data[1:,3]

 # Create an array of x values to fill b/w curves with a certain color.


 Here you specify the X values for the fill shape as going from 0 to 4:


 X1 = np.linspace(0.,4.,len(I_3))

 I_ref = I_ref.astype(float)*1000.
 I_1 = I_1.astype(float)*1000.
 I_2 = I_2.astype(float)*1000.
 I_3 = I_3.astype(float)*1000.


 # Plotting commands.


 Here you specify the X values for the line plots as being whatever I_ref
 is (I don't know what it is since I can't see your csv file):


 plot(I_ref, I_2, 'r-')
 plot(I_ref, I_3, 'b-')
 title('Current Mirror Output Swing')
 xlabel('$I_{ref}$ (mA)')
 ylabel('I (mA)')


 Try changing this line:


 plt.fill_between(X1, I_2, I_3, color = 'g', alpha = '0.5')


 to:

 plt.fill_between(I_ref, I_2, I_3, color = 'g', alpha = '0.5')

 and then the filled area should have the same X range as the lines.

 --
 Oscar


Thanks! This works now.
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Re: [Tutor] Shading Between Curves with Different Colour Over Specified X value Range

[Alan Gauld]

On 28/07/15 01:00, Colin Ross wrote:


*Issue: *

See attached figure.

Thank you.



There is no attachment to see, sorry :(



My apologies. SHould be there now!


The problem is a lot of mailing list servers (and even some
corporate mail servers) strip off attachments. In this case
I still can't see one so something between you and me is
stripping it. It may even be that some people will see it
and others don't.

For that reason it's usually better if you have access to
some web space to post the image there and provide a URL.
Or at least provide a textual description for those who
can't see the image.

hth
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos


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Re: [Tutor] Shading Between Curves with Different Colour Over Specified X value Range

[Colin Ross]

On Mon, Jul 27, 2015 at 5:01 PM, Mark Lawrence breamore...@yahoo.co.uk
wrote:

 On 27/07/2015 19:47, Colin Ross wrote:

 *Goal:* Shade between I_2 (curve 1) and I_3 (curve 2) with following
 conditions:
- Green for 0  x  4
- Red for 4  x  12

 *Code: *

 *Note: Code currently only attempting to shade green for 0  x  4 *


 import numpy as np
 import pylab
 from pylab import *
 import matplotlib.pyplot as plt
 import csv


 # Load data from .txt file

 with open('current_mirror_output_swing.csv', 'rb') as f:
 reader = csv.reader(f)
 your_list = list(reader)

 data = np.asarray(your_list)

 I_ref = np.asarray(data[1:,0])
 I_1 = data[1:,1]
 I_2 = data[1:,2]
 I_3 = data[1:,3]

 # Create an array of x values to fill b/w curves with a certain color.

 X1 = np.linspace(0.,4.,len(I_3))

 I_ref = I_ref.astype(float)*1000.
 I_1 = I_1.astype(float)*1000.
 I_2 = I_2.astype(float)*1000.
 I_3 = I_3.astype(float)*1000.


 # Plotting commands.

 plot(I_ref, I_2, 'r-')
 plot(I_ref, I_3, 'b-')
 title('Current Mirror Output Swing')
 xlabel('$I_{ref}$ (mA)')
 ylabel('I (mA)')

 plt.fill_between(X1, I_2, I_3, color = 'g', alpha = '0.5')
 plt.legend(['$I_{ref}$', '$I_{out}$'], loc='upper left')
 plt.grid()

 show()

 *Issue: *

 See attached figure.

 Thank you.


 There is no attachment to see, sorry :(


My apologies. SHould be there now!



 One thing to note about the following lines.

 from pylab import *
 import matplotlib.pyplot as plt

 The first was designed to make matplotlib easy to use interactively,
 especially in iPython, the second in a script.  IIRC the former is
 deprecated so I suggest you stick with the latter.


Great, thank you!




 --
 My fellow Pythonistas, ask not what our language can do for you, ask
 what you can do for our language.

 Mark Lawrence

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Re: [Tutor] Shading Between Curves with Different Colour Over Specified X value Range

[Oscar Benjamin]

On Mon, 27 Jul 2015 at 20:53 Colin Ross colin.ross@gmail.com wrote:

 *Goal:* Shade between I_2 (curve 1) and I_3 (curve 2) with following
 conditions:
   - Green for 0  x  4
   - Red for 4  x  12

 *Code: *

 *Note: Code currently only attempting to shade green for 0  x  4 *

 import numpy as np
 import pylab
 from pylab import *
 import matplotlib.pyplot as plt
 import csv


 # Load data from .txt file

 with open('current_mirror_output_swing.csv', 'rb') as f:
reader = csv.reader(f)
your_list = list(reader)

 data = np.asarray(your_list)

 I_ref = np.asarray(data[1:,0])
 I_1 = data[1:,1]
 I_2 = data[1:,2]
 I_3 = data[1:,3]

 # Create an array of x values to fill b/w curves with a certain color.


Here you specify the X values for the fill shape as going from 0 to 4:


 X1 = np.linspace(0.,4.,len(I_3))

 I_ref = I_ref.astype(float)*1000.
 I_1 = I_1.astype(float)*1000.
 I_2 = I_2.astype(float)*1000.
 I_3 = I_3.astype(float)*1000.


 # Plotting commands.


Here you specify the X values for the line plots as being whatever I_ref is
(I don't know what it is since I can't see your csv file):


 plot(I_ref, I_2, 'r-')
 plot(I_ref, I_3, 'b-')
 title('Current Mirror Output Swing')
 xlabel('$I_{ref}$ (mA)')
 ylabel('I (mA)')


Try changing this line:


 plt.fill_between(X1, I_2, I_3, color = 'g', alpha = '0.5')


to:

plt.fill_between(I_ref, I_2, I_3, color = 'g', alpha = '0.5')

and then the filled area should have the same X range as the lines.

--
Oscar
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Re: [Tutor] Shading Between Curves with Different Colour Over Specified X value Range

[Mark Lawrence]

On 27/07/2015 19:47, Colin Ross wrote:

*Goal:* Shade between I_2 (curve 1) and I_3 (curve 2) with following
conditions:
   - Green for 0  x  4
   - Red for 4  x  12

*Code: *

*Note: Code currently only attempting to shade green for 0  x  4 *

import numpy as np
import pylab
from pylab import *
import matplotlib.pyplot as plt
import csv


# Load data from .txt file

with open('current_mirror_output_swing.csv', 'rb') as f:
reader = csv.reader(f)
your_list = list(reader)

data = np.asarray(your_list)

I_ref = np.asarray(data[1:,0])
I_1 = data[1:,1]
I_2 = data[1:,2]
I_3 = data[1:,3]

# Create an array of x values to fill b/w curves with a certain color.

X1 = np.linspace(0.,4.,len(I_3))

I_ref = I_ref.astype(float)*1000.
I_1 = I_1.astype(float)*1000.
I_2 = I_2.astype(float)*1000.
I_3 = I_3.astype(float)*1000.


# Plotting commands.

plot(I_ref, I_2, 'r-')
plot(I_ref, I_3, 'b-')
title('Current Mirror Output Swing')
xlabel('$I_{ref}$ (mA)')
ylabel('I (mA)')

plt.fill_between(X1, I_2, I_3, color = 'g', alpha = '0.5')
plt.legend(['$I_{ref}$', '$I_{out}$'], loc='upper left')
plt.grid()

show()

*Issue: *

See attached figure.

Thank you.


There is no attachment to see, sorry :(

One thing to note about the following lines.

from pylab import *
import matplotlib.pyplot as plt

The first was designed to make matplotlib easy to use interactively, 
especially in iPython, the second in a script.  IIRC the former is 
deprecated so I suggest you stick with the latter.


--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence

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[Tutor] Shading Between Curves with Different Colour Over Specified X value Range

[Colin Ross]

*Goal:* Shade between I_2 (curve 1) and I_3 (curve 2) with following
conditions:
  - Green for 0  x  4
  - Red for 4  x  12

*Code: *

*Note: Code currently only attempting to shade green for 0  x  4 *

import numpy as np
import pylab
from pylab import *
import matplotlib.pyplot as plt
import csv


# Load data from .txt file

with open('current_mirror_output_swing.csv', 'rb') as f:
   reader = csv.reader(f)
   your_list = list(reader)

data = np.asarray(your_list)

I_ref = np.asarray(data[1:,0])
I_1 = data[1:,1]
I_2 = data[1:,2]
I_3 = data[1:,3]

# Create an array of x values to fill b/w curves with a certain color.

X1 = np.linspace(0.,4.,len(I_3))

I_ref = I_ref.astype(float)*1000.
I_1 = I_1.astype(float)*1000.
I_2 = I_2.astype(float)*1000.
I_3 = I_3.astype(float)*1000.


# Plotting commands.

plot(I_ref, I_2, 'r-')
plot(I_ref, I_3, 'b-')
title('Current Mirror Output Swing')
xlabel('$I_{ref}$ (mA)')
ylabel('I (mA)')

plt.fill_between(X1, I_2, I_3, color = 'g', alpha = '0.5')
plt.legend(['$I_{ref}$', '$I_{out}$'], loc='upper left')
plt.grid()

show()

*Issue: *

See attached figure.

Thank you.
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