Multiple lines, subplots and frames

Hi, I am new to plotly, but an adept user of matplotlib. I can’t find any good resources to help with the construction of more complex animations. The https://plot.ly/python/animations/ page is quite limited and talks a lot about buttons but not much about frames.

I am trying to plot multiple lines on individual subplots which are then updated as I move the slider along the bottom of the animation. However, when I attempt this, my chart does not work as intended. To me it appears as though the right chart fails to update and disappears completely by the end of the first automatic loop of the slider.

Here is the code, I have added two additional lines to the code which was created here - Multiple Plots running on Frames :

fig = dict(
layout = dict(
    xaxis1 = {'domain': [0.0, 0.44], 'anchor': 'y1', 'title': '1', 'range': [-2.25, 3.25]},
    yaxis1 = {'domain': [0.0, 1.0], 'anchor': 'x1', 'title': 'y', 'range': [-1, 11]},
    xaxis2 = {'domain': [0.56, 1.0], 'anchor': 'y2', 'title': '2', 'range': [-2.25, 3.25]},
    yaxis2 = {'domain': [0.0, 1.0], 'anchor': 'x2', 'title': 'y', 'range': [-1, 11]},
    title  = '',
    margin = {'t': 50, 'b': 50, 'l': 50, 'r': 50},
    updatemenus = [{'buttons': [{'args': [['0', '1', '2', '3'], {'frame': {'duration': 500.0, 'redraw': False}, 'fromcurrent': True, 'transition': {'duration': 0, 'easing': 'linear'}}], 'label': 'Play', 'method': 'animate'}, {'args': [[None], {'frame': {'duration': 0, 'redraw': False}, 'mode': 'immediate', 'transition': {'duration': 0}}], 'label': 'Pause', 'method': 'animate'}], 'direction': 'left', 'pad': {'r': 10, 't': 85}, 'showactive': True, 'type': 'buttons', 'x': 0.1, 'y': 0, 'xanchor': 'right', 'yanchor': 'top'}],
    sliders = [{'yanchor': 'top', 'xanchor': 'left', 'currentvalue': {'font': {'size': 16}, 'prefix': 'Frame: ', 'visible': True, 'xanchor': 'right'}, 'transition': {'duration': 500.0, 'easing': 'linear'}, 'pad': {'b': 10, 't': 50}, 'len': 0.9, 'x': 0.1, 'y': 0, 
                'steps': [{'args': [['0'], {'frame': {'duration': 500.0, 'easing': 'linear', 'redraw': False}, 'transition': {'duration': 0, 'easing': 'linear'}}], 'label': '0', 'method': 'animate'}, 
                          {'args': [['1'], {'frame': {'duration': 500.0, 'easing': 'linear', 'redraw': False}, 'transition': {'duration': 0, 'easing': 'linear'}}], 'label': '1', 'method': 'animate'}, 
                          {'args': [['2'], {'frame': {'duration': 500.0, 'easing': 'linear', 'redraw': False}, 'transition': {'duration': 0, 'easing': 'linear'}}], 'label': '2', 'method': 'animate'},
                          {'args': [['3'], {'frame': {'duration': 500.0, 'easing': 'linear', 'redraw': False}, 'transition': {'duration': 0, 'easing': 'linear'}}], 'label': '3', 'method': 'animate'}, 
                ]}]
),
data = [
    {'type': 'scatter', 'name': 'f1', 'x': [-2.  , -1.  ,  0.01,  1.  ,  2.  ,  3.  ], 'y': [  4,   1,   1, 1,   4,   9], 'hoverinfo': 'name+text', 'marker': {'opacity': 1.0, 'symbol': 'circle', 'line': {'width': 0, 'color': 'rgba(50,50,50,0.8)'}}, 'line': {'color': 'rgba(255,79,38,1.000000)'}, 'mode': 'markers+lines', 'fillcolor': 'rgba(255,79,38,0.600000)', 'legendgroup': 'f1', 'showlegend': True, 'xaxis': 'x1', 'yaxis': 'y1'},
{'type': 'scatter', 'name': 'f2', 'x': [-2.  , -1.  ,  0.01,  1.  ,  2.  ,  3.  ], 'y': [  2.5,   1,   1, 1,   2.5,   1], 'hoverinfo': 'name+text', 'marker': {'opacity': 1.0, 'symbol': 'circle', 'line': {'width': 0, 'color': 'rgba(50,50,50,0.8)'}}, 'line': {'color': 'rgba(79,102,165,1.000000)'}, 'mode': 'markers+lines', 'fillcolor': 'rgba(79,102,165,0.600000)', 'legendgroup': 'f2', 'showlegend': True, 'xaxis': 'x2', 'yaxis': 'y2'},
],
frames = [
    {'name' : '0', 'layout' : {},
     'data': [
         {'type': 'scatter', 'name': 'f1', 'x': [-2.  , -1.  ,  0.01,  1.  ,  2.  ,  3.  ], 'y': [  5,   8,   3, 2,   4,   0], 'hoverinfo': 'name+text', 'marker': {'opacity': 1.0, 'symbol': 'circle', 'line': {'width': 0, 'color': 'rgba(50,50,50,0.8)'}}, 'line': {'color': 'rgba(255,79,38,1.000000)'}, 'mode': 'markers+lines', 'fillcolor': 'rgba(255,79,38,0.600000)', 'legendgroup': 'f1', 'showlegend': True, 'xaxis': 'x1', 'yaxis': 'y1'}, 
#              {'type': 'scatter', 'name': 'f1', 'x': [-2.  , -1.  ,  0.01,  1.  ,  2.  ,  3.  ], 'y': [  4,   7,   2, 1,   3,   0], 'hoverinfo': 'name+text', 'marker': {'opacity': 1.0, 'symbol': 'circle', 'line': {'width': 0, 'color': 'rgba(50,50,50,0.8)'}}, 'line': {'color': 'rgba(255,79,38,1.000000)'}, 'mode': 'markers+lines', 'fillcolor': 'rgba(255,79,38,0.600000)', 'legendgroup': 'f1', 'showlegend': True, 'xaxis': 'x1', 'yaxis': 'y1'},
         {'type': 'scatter', 'name': 'f2', 'x': [-2.  , -1.  ,  0.01,  1.  ,  2.  ,  3.  ], 'y': [  3,   7,   4, 8,   5,   9], 'hoverinfo': 'name+text', 'marker': {'opacity': 1.0, 'symbol': 'circle', 'line': {'width': 0, 'color': 'rgba(50,50,50,0.8)'}}, 'line': {'color': 'rgba(79,102,165,1.000000)'}, 'mode': 'markers+lines', 'fillcolor': 'rgba(79,102,165,0.600000)', 'legendgroup': 'f2', 'showlegend': True, 'xaxis': 'x2', 'yaxis': 'y2'},
#              {'type': 'scatter', 'name': 'f2', 'x': [-2.  , -1.  ,  0.01,  1.  ,  2.  ,  3.  ], 'y': [  2,   8,   3, 9,   4,   9], 'hoverinfo': 'name+text', 'marker': {'opacity': 1.0, 'symbol': 'circle', 'line': {'width': 0, 'color': 'rgba(50,50,50,0.8)'}}, 'line': {'color': 'rgba(79,102,165,1.000000)'}, 'mode': 'markers+lines', 'fillcolor': 'rgba(79,102,165,0.600000)', 'legendgroup': 'f2', 'showlegend': True, 'xaxis': 'x2', 'yaxis': 'y2'}
     ],
    },
    {'name' : '1', 'layout' : {},
     'data': [
         {'type': 'scatter', 'name': 'f1', 'x': [-2.  , -1.  ,  0.01,  1.  ,  2.  ,  3.  ], 'y': [  4,   1,   1, 1,   4,   9], 'hoverinfo': 'name+text', 'marker': {'opacity': 1.0, 'symbol': 'circle', 'line': {'width': 0, 'color': 'rgba(50,50,50,0.8)'}}, 'line': {'color': 'rgba(255,79,38,1.000000)'}, 'mode': 'markers+lines', 'fillcolor': 'rgba(255,79,38,0.600000)', 'legendgroup': 'f1', 'showlegend': True, 'xaxis': 'x1', 'yaxis': 'y1'}, 
         {'type': 'scatter', 'name': 'f2', 'x': [-2.  , -1.  ,  0.01,  1.  ,  2.  ,  3.  ], 'y': [  2.5,   1,   1, 1,   2.5,   1], 'hoverinfo': 'name+text', 'marker': {'opacity': 1.0, 'symbol': 'circle', 'line': {'width': 0, 'color': 'rgba(50,50,50,0.8)'}}, 'line': {'color': 'rgba(79,102,165,1.000000)'}, 'mode': 'markers+lines', 'fillcolor': 'rgba(79,102,165,0.600000)', 'legendgroup': 'f2', 'showlegend': True, 'xaxis': 'x2', 'yaxis': 'y2'}],
    },
    {'name' : '2', 'layout' : {},
     'data': [
         {'type': 'scatter', 'name': 'f1', 'x': [-2.  , -1.  ,  0.01,  1.  ,  2.  ,  3.  ], 'y': [  5,   8,   3, 2,   4,   0], 'hoverinfo': 'name+text', 'marker': {'opacity': 1.0, 'symbol': 'circle', 'line': {'width': 0, 'color': 'rgba(50,50,50,0.8)'}}, 'line': {'color': 'rgba(255,79,38,1.000000)'}, 'mode': 'markers+lines', 'fillcolor': 'rgba(255,79,38,0.600000)', 'legendgroup': 'f1', 'showlegend': True, 'xaxis': 'x1', 'yaxis': 'y1'}, 
         {'type': 'scatter', 'name': 'f2', 'x': [-2.  , -1.  ,  0.01,  1.  ,  2.  ,  3.  ], 'y': [  3,   7,   4, 8,   5,   9], 'hoverinfo': 'name+text', 'marker': {'opacity': 1.0, 'symbol': 'circle', 'line': {'width': 0, 'color': 'rgba(50,50,50,0.8)'}}, 'line': {'color': 'rgba(79,102,165,1.000000)'}, 'mode': 'markers+lines', 'fillcolor': 'rgba(79,102,165,0.600000)', 'legendgroup': 'f2', 'showlegend': True, 'xaxis': 'x2', 'yaxis': 'y2'}],
    },
    {'name' : '3', 'layout' : {},
     'data': [
         {'type': 'scatter', 'name': 'f1', 'x': [-2.  , -1.  ,  0.01,  1.  ,  2.  ,  3.  ], 'y': [  4,   1,   1, 1,   4,   9], 'hoverinfo': 'name+text', 'marker': {'opacity': 1.0, 'symbol': 'circle', 'line': {'width': 0, 'color': 'rgba(50,50,50,0.8)'}}, 'line': {'color': 'rgba(255,79,38,1.000000)'}, 'mode': 'markers+lines', 'fillcolor': 'rgba(255,79,38,0.600000)', 'legendgroup': 'f1', 'showlegend': True, 'xaxis': 'x1', 'yaxis': 'y1'}, 
         {'type': 'scatter', 'name': 'f2', 'x': [-2.  , -1.  ,  0.01,  1.  ,  2.  ,  3.  ], 'y': [  2.5,   1,   1, 1,   2.5,   1], 'hoverinfo': 'name+text', 'marker': {'opacity': 1.0, 'symbol': 'circle', 'line': {'width': 0, 'color': 'rgba(50,50,50,0.8)'}}, 'line': {'color': 'rgba(79,102,165,1.000000)'}, 'mode': 'markers+lines', 'fillcolor': 'rgba(79,102,165,0.600000)', 'legendgroup': 'f2', 'showlegend': True, 'xaxis': 'x2', 'yaxis': 'y2'}],
    }
]
)
plotly.offline.plot(fig, auto_open=True)

When I un-comment the two lines, I would expect the first frame of the animation to contain two lines in each sub-plot, and for them to disappear afterwards when the slider is moved. I am assuming that when ‘frames’ is present in the figure dictionary, the ‘data’ part of this figure holds only the information that the plot first displays when it is loaded which becomes redundant once the slider moves.

@quanpy It is very difficult to learn how to animate the traces in a subplot with a code like that pasted above.
It seems to be derived from a fig representing a subplot, saved as a json file.

I uploaded a jupyter notebook https://plot.ly/~empet/15243 that explains step by step how we define the subplot, add data traces to each subplot cell, and what info
is needed to define each frame.

I wrote the code for Plotly 4.1.0 (you can update to 4.1.1, a version released today, sept 3).
What is missing to the code you pasted here is the key traces in frames definition.

Unfortunately Plotly tutorials don’t stress that for subplot animations and when we update more than one trace in each frame of an animation plot, we have to insert the key traces in the frame definition (details in the uploaded notebook).

2 Likes

Thank you @empet for the explanation and notebook, very useful.