New chart API?

Software and Tools Other - Software and tools
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1

I don't see the ct.chart.* API any more in the (sis-dev) toolbox.  Is there a new API?


kr.

Roeland

2

Hi Roeland,

Can you give more information about this, please ? Do you have an example of using the ct.chart.* API ? it sounds like it could be very useful!

Thanks,
Kevin

3

The API is back (smile).


Kevin Marsh  This is an example for chart.line

chart example Expand source 
import cdstoolbox as ct

layout = {

‘input_ncols’: 3,

}


variables = {

‘Near-Surface Air Temperature’: ‘2m_temperature’,

‘Eastward Near-Surface Wind’: ‘10m_u_component_of_wind’,

‘Northward Near-Surface Wind’: ‘10m_v_component_of_wind’,

‘Sea Level Pressure’: ‘mean_sea_level_pressure’,

‘Sea Surface Temperature’: ‘sea_surface_temperature’,

}


@ct.application(title=‘Extract a time series and plot graph’, layout=layout)

@ct.input.dropdown(‘var’, label=‘Variable’, values=variables.keys(), description=‘Sample variables’)

@ct.input.text(‘lon’, label=‘Longitude’, type=float, default=75., description=‘Decimal degrees’)

@ct.input.text(‘lat’, label=‘Latitude’, type=float, default=43., description=‘Decimal degrees’)

@ct.output.livefigure()

def plot_time_series(var, lon, lat):

“”"

Application main steps:


- set the application layout with 3 columns for the input and output at the bottom
- retrieve a variable over a defined time range
- select a location, defined by longitude and latitude coordinates
- compute the daily average
- show the result as a timeseries on an interactive chart

"""

# Time range
data = ct.catalogue.retrieve(
    'reanalysis-era5-single-levels',
    {
        'variable': variables[var],
        'grid': ['3', '3'],
        'product_type': 'reanalysis',
        'year': [
            '2008', '2009', '2010',
            '2011', '2012', '2013',
            '2014', '2015', '2016',
            '2017'
        ],
        'month': [
            '01', '02', '03', '04', '05', '06',
            '07', '08', '09', '10', '11', '12'
        ],
        'day': [
            '01', '02', '03', '04', '05', '06',
            '07', '08', '09', '10', '11', '12',
            '13', '14', '15', '16', '17', '18',
            '19', '20', '21', '22', '23', '24',
            '25', '26', '27', '28', '29', '30',
            '31'
        ],
        'time': ['00:00', '06:00', '12:00', '18:00'],
    }
)

# Location selection
data_sel = ct.geo.extract_point(data, lon=lon, lat=lat)
# Daily mean on selection
data_daily = ct.climate.daily_mean(data_sel)
fig = ct.chart.line(data_daily)
return fig</pre>
4

Thanks Roeland! Glad its working now!

Kevin