Plotting Area Plots

Quick reference

• 00:05 Okay, in this video I want to look at area plots.
• 00:08 And an area plot just graphs the area underneath your data, right?
• 00:13 So we could call my_df and we could pick the column or
• 00:17 we could just pick the whole thing and let's go .plot and
• 00:22 we want the kind='area'.
• 00:26 Now, this actually won't work.
• 00:27 If we run this, we get an error.
• 00:29 And if we look down here, it says each column either has to be all positive or
• 00:34 negative, it can't contain both positive and negative.
• 00:38 And if we look back up at our data here, we see there is negative numbers and
• 00:42 positive numbers.
• 00:42 So to tweak our data a little bit here, we can just run our function on this as
• 00:46 we've learned way back at the beginning of the course.
• 00:48 We could call the absolute value function and Python is object oriented, so
• 00:53 you could stack .abs on top of .plot,
• 00:57 on top of dot whatever, you can just keep adding dot things with Python.
• 01:01 And so that's cool.
• 01:02 Now, we get this sort of crazy jumbled up area plot and if we come back to our data,
• 01:08 we've got 100 points, maybe we want to make this a little more simpler.
• 01:11 We can run this with 50 points if we rerun our thing here and
• 01:15 then come down here and run this again.
• 01:18 Okay, maybe it's a little less hectic and easier to see.
• 01:21 Now,you'll notice each of these things are not very transparent,
• 01:26 so you can't really see through to see exactly what's going on, for instance,
• 01:30 with the red, it's in the background there, right?
• 01:32 So we can actually come up here to the kind and now, we can add alpha= and
• 01:37 then designate some transparency.
• 01:40 So I'm going to go 0.3, let's say, and a sort of very light.
• 01:45 We could go 0.6 and it's a little darker.
• 01:49 So whatever you want, transparency wise, that's cool.
• 01:53 And that's area plot.
• 01:55 Now, if we want to learn about the different attributes that we can
• 01:58 use in this function, you normally hit Shift Tab.
• 02:00 And when I do that now, nothing happens.
• 02:02 That's because we're stacking this on top of the dot absolute thing.
• 02:06 So we take this out and then come back and Shift Tab.
• 02:09 Now, we can get in here and we can see some of the things.
• 02:13 So we can add a legend true false, that's this little box right here.
• 02:18 We can put a title on here, all kinds of stuff.
• 02:22 And you can always come in here and
• 02:24 read about any of these things to learn more about them.
• 02:26 So, let's try this, let's go legend=false and
• 02:31 we're going to have to come back here and
• 02:34 put our .abs back and now that box disappears.
• 02:38 So if we want this to be true, the box comes back.
• 02:43 It's true by default, so we could just leave that off.
• 02:46 We can add a title and
• 02:49 we can put, I don't know, My Area Plot.
• 02:55 And now, we got a little title up there.
• 02:57 So all kinds of cool things you can do with this.
• 02:59 So that's an area plot.
• 03:01 In the next video, we'll look at bar plots.

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