Visualize Image Chart

Scatter plot is the only plot type currently supported. A non-numeric column can be specified as x or y column and jitters can be added to them to avoid excessive overlapping. All color values must be in the format RRGGBB or AARRGGBB (to specify the alpha value). The image is contained in the output parameter image_data field.

Input Parameter Description

Name	Type	Description
table_name	string	Name of the table containing the data to be drawn as a chart.
x_column_name	string	Name of the column containing the data mapped to the x axis of a chart.
y_column_name	string	Name of the column containing the data mapped to the y axis of a chart.
min_x	double	Lower bound for the x column values. For non-numeric x column, each x column item is mapped to an integral value starting from 0.
max_x	double	Upper bound for the x column values. For non-numeric x column, each x column item is mapped to an integral value starting from 0.
min_y	double	Lower bound for the y column values. For non-numeric y column, each y column item is mapped to an integral value starting from 0.
max_y	double	Upper bound for the y column values. For non-numeric y column, each y column item is mapped to an integral value starting from 0.
width	int	Width of the generated image in pixels.
height	int	Height of the generated image in pixels.
bg_color	string	Background color of the generated image.
style_options	map of string to arrays of strings	Rendering style options for a chart. Supported Parameters (keys) Parameter Description pointcolor The color of points in the plot represented as a hexadecimal number. Default value is '0000FF'. pointsize The size of points in the plot represented as number of pixels. Default value is '3'. The minimum allowed value is 0. The maximum allowed value is 20. pointshape The shape of points in the plot. Default value is 'square'. The allowed values are: none circle square diamond hollowcircle hollowsquare hollowdiamond cb_pointcolors Point color class break information consisting of three entries: class-break attribute, class-break values/ranges, and point color values. This option overrides the pointcolor option if both are provided. Class-break ranges are represented in the form of "min:max". Class-break values/ranges and point color values are separated by cb_delimiter, e.g. {"price", "20:30;30:40;40:50", "0xFF0000;0x00FF00;0x0000FF"}. cb_pointsizes Point size class break information consisting of three entries: class-break attribute, class-break values/ranges, and point size values. This option overrides the pointsize option if both are provided. Class-break ranges are represented in the form of "min:max". Class-break values/ranges and point size values are separated by cb_delimiter, e.g. {"states", "NY;TX;CA", "3;5;7"}. cb_pointshapes Point shape class break information consisting of three entries: class-break attribute, class-break values/ranges, and point shape names. This option overrides the pointshape option if both are provided. Class-break ranges are represented in the form of "min:max". Class-break values/ranges and point shape names are separated by cb_delimiter, e.g. {"states", "NY;TX;CA", "circle;square;diamond"}. cb_delimiter A character or string which separates per-class values in a class-break style option string. Default value is ';'. x_order_by An expression or aggregate expression by which non-numeric x column values are sorted, e.g. "avg(price) descending". y_order_by An expression or aggregate expression by which non-numeric y column values are sorted, e.g. "avg(price)", which defaults to "avg(price) ascending". jitter_x Amplitude of horizontal jitter applied to non-numaric x column values. Default value is '0.0'. The minimum allowed value is 0.0. The maximum allowed value is 1.0. jitter_y Amplitude of vertical jitter applied to non-numaric y column values. Default value is '0.0'. The minimum allowed value is 0.0. The maximum allowed value is 1.0. plot_all If this options is set to "true", all non-numeric column values are plotted ignoring min_x, max_x, min_y and max_y parameters. Default value is 'false'.
options	map of string to strings	Optional parameters. Default value is an empty map ( {} ).

Output Parameter Description

Name	Type	Description
min_x	double	Lower bound for the x column values as provided in input parameter min_x or calculated for non-numeric columns when plot_all option is used.
max_x	double	Upper bound for the x column values as provided in input parameter max_x or calculated for non-numeric columns when plot_all option is used.
min_y	double	Lower bound for the y column values as provided in input parameter min_y or calculated for non-numeric columns when plot_all option is used.
max_y	double	Upper bound for the y column values as provided in input parameter max_y or calculated for non-numeric columns when plot_all option is used.
width	int	Width of the image as provided in input parameter width.
height	int	Height of the image as provided in input parameter height.
bg_color	string	Background color of the image as provided in input parameter bg_color.
image_data	bytes	The generated image data.
axes_info	map of string to arrays of strings	Information returned for drawing labels for the axes associated with non-numeric columns. Supported Parameters (keys) Parameter Description sorted_x_values Sorted non-numeric x column value list for drawing x axis label. location_x X axis label positions of sorted_x_values in pixel coordinates. sorted_y_values Sorted non-numeric y column value list for drawing y axis label. location_y Y axis label positions of sorted_y_values in pixel coordinates.