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Check alpha/opacity effects

In [7]:
from lets_plot import *
import re

LetsPlot.setup_html()
In [8]:
def text_plot(color, alpha):
    rgba_alpha = None
    m = re.match(r'rgba\(\s*\d+\s*,\s*\d+\s*,\s*\d+\s*,\s*([0-9.]+)\s*\)', color)
    if m:
        rgba_alpha = float(m.group(1))
        
    label = f"{rgba_alpha}\n{alpha}"
    
    return (
        ggplot() +
        geom_text(
            x=0, y=0,
            label=label,
            size=24,
            color=color,
            alpha=alpha
        ) +
        theme_void() +
        theme(panel_grid_major=element_line(size=4)) +
        ggsize(300, 200)
    )
In [9]:
gggrid([
    text_plot(color='rgba(255,0,0,0)', alpha=None),
    text_plot(color='rgba(255,0,0,0)', alpha=0),
    text_plot(color='rgba(255,0,0,0)', alpha=0.3),
    text_plot(color='rgba(255,0,0,0)', alpha=1),
    #
    text_plot(color='rgba(255,0,0,0.3)', alpha=None),
    text_plot(color='rgba(255,0,0,0.3)', alpha=0),
    text_plot(color='rgba(255,0,0,0.3)', alpha=0.3),
    text_plot(color='rgba(255,0,0,0.3)', alpha=1),
    #
    text_plot(color='rgba(255,0,0,0.6)', alpha=None),
    text_plot(color='rgba(255,0,0,0.6)', alpha=0),
    text_plot(color='rgba(255,0,0,0.6)', alpha=0.3),
    text_plot(color='rgba(255,0,0,0.6)', alpha=1),
    #
    text_plot(color='rgba(255,0,0,1)', alpha=None),
    text_plot(color='rgba(255,0,0,1)', alpha=0),
    text_plot(color='rgba(255,0,0,1)', alpha=0.3),
    text_plot(color='rgba(255,0,0,1)', alpha=1)
], ncol=4) + ggsize(600, 800) + ggtitle('If set, the alpha aesthetic overrides the alpha from the color')
Out[9]:
In [10]:
# element_text
(ggplot({'x': [1, 2, 3], 'y': [2, 4, 3]}, aes('x', 'y'))
    + geom_point(size=5)
    + geom_line()
    + labs(
        title='Plot Title',
        subtitle='Plot Subtitle',
        caption='Plot Caption',
        tag='A'
    )
    + theme(
        plot_title=element_text(color="rgba(255,0,0, 0.3)", size=28),
        plot_subtitle=element_text(color="rgba(0,255,0, 0.3)", size=24),
        plot_caption=element_text(color="rgba(0,255,255, 0.3)", size=22),
        plot_tag=element_text(color="rgba(255,0,255, 0.3)", size=30, face='bold')
    )
)
Out[10]:
In [11]:
# geom_tile
(
    ggplot({'x': [1, 2], 'y': [1, 1]}) 
    + geom_tile(
        aes(x='x', y='y'), 
        color='rgba(0,0,0,0.2)', 
        size=2, 
        alpha = 0.3, 
        linetype=4
    )
)
Out[11]:
In [12]:
df = {
    'x': [0, 1, 2, 3],
    'y': [0, 0, 0, 0],
    'label': ['0%', '25%', '50%', '100%'],
    'color': ['#ff000000', '#ff000040', '#ff000080', '#ff0000ff'],
}

(
    ggplot(df, aes('x', 'y'))
    + geom_text(aes(label='label', color='color'), size=16)
    + scale_color_identity()
    + ggsize(500, 180)
)
Out[12]: