Heatmap and Contour traces disappear with figure animation.

[rottaj]

There is an issue with the heat map and contour plots when used as a trace with animations. Attached is some code; when run the heat-map disappears when animation begins.

`
scatterDf = pd.DataFrame({'Time': scatterDataX, 'Depth': scatterDataY, 'TimeShow': scatterTime})
print(scatterDf, 'DF')

fig = go.Figure()

data = [go.Scatter(
x=[],
y=[],
mode='markers',
marker=dict(color='blue')
)]

dataX = list(scatterDf['Time'])
dataY = list(scatterDf['Depth'])

frames = [dict(data= [dict(type='scatter',
x=dataX[:k+1],
y=dataY[:k+1])],
traces= [1],
name='frame{}'.format(k)
)for k in range(1, len(scatterDf))]

layout = go.Layout(
autosize=True,
hovermode='closest',
)

sliders = [dict(steps= [dict(method= 'animate',
args= [[ 'frame{}'.format(k) ],
dict(mode= 'immediate',
frame= dict( duration=100, redraw= False ),
transition=dict( duration= 0)
)
],
label='{:d}'.format(k)
) for k in range(len(scatterDf))],
transition= dict(duration= 0 ),
x=0,#slider starting position
y=0,
currentvalue=dict(font=dict(size=12),
prefix='Point: ',
visible=True,
xanchor= 'center'),
len=1.0)
]

layout.update(updatemenus=[dict(type='buttons', showactive=False,
y=0,
x=1.05,
buttons=[dict(label='Play',
method='animate',
args=[None,
dict(frame=dict(duration=100,
redraw=False),
transition=dict(duration=0),
fromcurrent=True, mode='immediate')
]
)
]
)
],
sliders=sliders)

fig = go.Figure(data=data, layout=layout, frames=frames)
fig.update_yaxes(autorange="reversed", range=[5000, -1000])
fig.add_heatmap(z=z2, zauto=False, zmin=-1, zmax=1)
fig.show()

`

[etpinard]

This ticket is essentially equivalent to #1019 but for heatmap and contour traces.

Please note that only scatter and bar traces support coordinate animations at the moment.

Future animation development can be tracked in #3456, so I'll close this issue.