Try to create iPython online notebook in google Collab

[cyberslam]

When running under Google Colab using the following command:
"!python3 -m htm.examples.hotgym"

The following was the print-out (no error) but no plot at the end:

Parameters:
{ 'enc': {'resolution': 0.88, 'size': 700, 'sparsity': 0.02},
'sdrc_alpha': 0.1,
'sp': { 'boostStrength': 3.0,
'columnCount': 1638,
'numActiveColumnsPerInhArea': 72,
'potentialPct': 0.85,
'synPermActiveInc': 0.04,
'synPermConnected': 0.13999999999999999,
'synPermInactiveDec': 0.006},
'time': {'timeOfDay': (30, 1), 'weekend': 21},
'tm': { 'activationThreshold': 17,
'cellsPerColumn': 13,
'initialPerm': 0.21,
'maxSegmentsPerCell': 128,
'maxSynapsesPerSegment': 64,
'minThreshold': 10,
'newSynapseCount': 32,
'permanenceDec': 0.1,
'permanenceInc': 0.1}}

Encoded Input SDR( 11765 )
Sparsity Min/Mean/Std/Max 0.00543986 / 0.00552255 / 1.35811e-05 / 0.00552486
Activation Frequency Min/Mean/Std/Max 0 / 0.00552295 / 0.0317386 / 0.502847
Entropy 0.635806
Overlap Min/Mean/Std/Max 0.307692 / 0.891246 / 0.126693 / 1

Spatial Pooler Mini-Columns SDR( 1638 )
Sparsity Min/Mean/Std/Max 0.043956 / 0.0439559 / 2.08729e-07 / 0.043956
Activation Frequency Min/Mean/Std/Max 0.0170804 / 0.0439561 / 0.0182792 / 0.10066
Entropy 0.979711
Overlap Min/Mean/Std/Max 0 / 0.846308 / 0.256087 / 1
Spatial Pooler Connections:
Inputs (11765) ~> Outputs (1638) via Segments (1638)
Segments on Cell Min/Mean/Max 1 / 1 / 1
Potential Synapses on Segment Min/Mean/Max 10000 / 10000 / 10000
Connected Synapses on Segment Min/Mean/Max 86 / 395.876 / 2454
Synapses Dead (0.913949%) Saturated (0.00240562%)

Temporal Memory Cells SDR( 21294 )
Sparsity Min/Mean/Std/Max 0.00338123 / 0.0123309 / 0.013492 / 0.043956
Activation Frequency Min/Mean/Std/Max 0.00204964 / 0.012331 / 0.00762384 / 0.0594398
Entropy 0.968392
Overlap Min/Mean/Std/Max 0 / 0.609997 / 0.381052 / 1
Temporal Memory Connections:
Inputs (17335) ~> Outputs (21294) via Segments (41695)
Segments on Cell Min/Mean/Max 0 / 1.95806 / 11
Potential Synapses on Segment Min/Mean/Max 32 / 36.8715 / 64
Connected Synapses on Segment Min/Mean/Max 28 / 34.0534 / 64
Synapses Dead (0%) Saturated (0.283736%)

Predictive Error (RMS) 1 steps ahead: 18.07927468676872
Predictive Error (RMS) 5 steps ahead: 22.10117101589806
Anomaly Mean 0.2099781116136428
Anomaly Std 0.3366711792821944
<Figure size 640x480 with 2 Axes>

I had tried to put an inline comand: "%matplotlib inline"
underneath "import matplotlib.pyplot as plt", but got the same result

 import matplotlib.pyplot as plt
 %matplotlib inline 

same result: (no plot)
.....
<Figure size 640x480 with 2 Axes>

Please help!

[breznak]

• I think the examples don't install the plot dependencies by default, so check matplotlib is install
• check that matplotlib is working in the google ipython notebook, I suspect it's not

[cyberslam]

I had tried to import matplotlib at the beginning and also via inline versions: both were NOT effective or obtained the same result --> <Figure size 640x480 with 2 Axes>

I also had added a simple "print" (print ("Checking matplotlib here") ) statement underneath "import matplotlib.pyplot as plt" and got nothing printed!

Can anyone guide me what to do next?! Many thanks.

[breznak]

I'd suggest first try to run the example locally under ipython3 if it works?

this seems the plot works actually, do you need to call something like plt.show()?

But overall, this does not seem like issue in htm.core itself.

[cyberslam]

I tried the following in a new cell under Colab and it plotted the test chart!

Testing of matplotlib

import os
!pwd
!ls -l

import matplotlib.pyplot as plt
plt.plot(range(10))
plt.show()

and it plotted a diagonal line.

So why it won't plot in hotgym.py???

[ctrl-z-9000-times]

I don't why it doesn't work. It works for me on my computer. From your description it sounds like an issue with matplotlib.

Here is a stack-overflow link which might describe your issue?
https://stackoverflow.com/questions/13151514/matplotlib-plot-window-wont-appear

Maybe you could try changing the line plt.show to plt.savefig('filename.svg') and then viewing the saved image file?

[breznak]

@cyberslam would you describe your steps to install htm.core in google colab?
I'd love to have an online iPython notebook on Collab for htm.core! 💡