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update scientific charts for plotly v3 #1184

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19a1f4c
update streamline for plotly v3
michaelbabyn Nov 22, 2018
6c4b3cd
update quiver example for plotly 3.0
michaelbabyn Nov 22, 2018
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65 changes: 48 additions & 17 deletions _posts/python/scientific/quiver/2015-06-30-quiver.html
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Expand Up @@ -10,12 +10,12 @@
title: Python Quiver Plots | plotly
display_as: scientific
has_thumbnail: true
order: 12
ipynb: ~notebook_demo/42
order: 12
page_type: u-guide
---
{% raw %}
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<pre>&#39;2.0.2&#39;</pre>
<pre>&#39;3.4.1&#39;</pre>
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Expand Down Expand Up @@ -95,9 +96,11 @@ <h4 id="Basic-Quiver-Plot">Basic Quiver Plot<a class="anchor-link" href="#Basic-


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<iframe id="igraph" scrolling="no" style="border:none;" seamless="seamless" src="https://plot.ly/~PythonPlotBot/467.embed" height="525px" width="100%"></iframe>
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Expand All @@ -108,8 +111,7 @@ <h4 id="Basic-Quiver-Plot">Basic Quiver Plot<a class="anchor-link" href="#Basic-
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<div class=" highlight hl-ipython2"><pre><span></span><span class="kn">import</span> <span class="nn">plotly.plotly</span> <span class="kn">as</span> <span class="nn">py</span>
Expand Down Expand Up @@ -147,7 +149,7 @@ <h4 id="Quiver-Plot-with-Points">Quiver Plot with Points<a class="anchor-link" h
<span class="n">name</span><span class="o">=</span><span class="s1">&#39;points&#39;</span><span class="p">)</span>

<span class="c1"># Add points to figure</span>
<span class="n">fig</span><span class="p">[</span><span class="s1">&#39;data&#39;</span><span class="p">]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">points</span><span class="p">)</span>
<span class="n">fig</span><span class="o">.</span><span class="n">add_trace</span><span class="p">(</span><span class="n">points</span><span class="p">)</span>

<span class="n">py</span><span class="o">.</span><span class="n">iplot</span><span class="p">(</span><span class="n">fig</span><span class="p">,</span> <span class="n">filename</span><span class="o">=</span><span class="s1">&#39;Quiver with Points&#39;</span><span class="p">)</span>
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Expand All @@ -174,8 +178,7 @@ <h4 id="Quiver-Plot-with-Points">Quiver Plot with Points<a class="anchor-link" h
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<div class=" highlight hl-ipython2"><pre><span></span><span class="n">help</span><span class="p">(</span><span class="n">ff</span><span class="o">.</span><span class="n">create_quiver</span><span class="p">)</span>
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<pre>Help on function create_quiver in module plotly.figure_factory._quiver:

create_quiver(x, y, u, v, scale=0.1, arrow_scale=0.3, angle=0.3490658503988659, **kwargs)
create_quiver(x, y, u, v, scale=0.1, arrow_scale=0.3, angle=0.3490658503988659, scaleratio=None, **kwargs)
Returns data for a quiver plot.

:param (list|ndarray) x: x coordinates of the arrow locations
Expand All @@ -217,6 +222,9 @@ <h4 id="Reference">Reference<a class="anchor-link" href="#Reference">&#182;</a><
:param (float in [0,1]) arrow_scale: value multiplied to length of barb
to get length of arrowhead. Default = .3
:param (angle in radians) angle: angle of arrowhead. Default = pi/9
:param (positive float) scaleratio: the ratio between the scale of the y-axis
and the scale of the x-axis (scale_y / scale_x). Default = None, the
scale ratio is not fixed.
:param kwargs: kwargs passed through plotly.graph_objs.Scatter
for more information on valid kwargs call
help(plotly.graph_objs.Scatter)
Expand Down Expand Up @@ -271,14 +279,37 @@ <h4 id="Reference">Reference<a class="anchor-link" href="#Reference">&#182;</a><

# Create quiver
fig = create_quiver(x, y, u, v, scale=.2, arrow_scale=.3, angle=math.pi/6,
name=&#39;Wind Velocity&#39;, line=Line(width=1))
name=&#39;Wind Velocity&#39;, line=dict(width=1))

# Add title to layout
fig[&#39;layout&#39;].update(title=&#39;Quiver Plot&#39;)

# Plot
py.plot(fig, filename=&#39;quiver&#39;)
```

Example 4: Forcing a fix scale ratio to maintain the arrow length
```
import plotly.plotly as py
from plotly.figure_factory import create_quiver

import numpy as np

# Add data
x,y = np.meshgrid(np.arange(0.5, 3.5, .5), np.arange(0.5, 4.5, .5))
u = x
v = y
angle = np.arctan(v / u)
norm = 0.25
u = norm * np.cos(angle)
v = norm * np.sin(angle)

# Create quiver with a fix scale ratio
fig = create_quiver(x, y, u, v, scale = 1, scaleratio = 0.5)

# Plot
py.plot(fig, filename=&#39;quiver&#39;)
```

</pre>
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