toyplot.projection module¶
-
class
toyplot.projection.
Piecewise
(segments)[source]¶ Bases:
toyplot.projection.Projection
Compute a projection from an arbitrary collection of linear and log segments.
-
class
toyplot.projection.
Projection
[source]¶ Bases:
object
Base class for objects that can map from domain to range and range to domain.
-
toyplot.projection.
linear
(domain_min, domain_max, range_min, range_max)[source]¶ Return an instance of
toyplot.projection.Piecewise
that performs a linear projection.Parameters: - domain_min, domain_max (number) – Defines a closed interval of domain values that will be mapped to the range.
- range_min, range_max (number) – Defines a closed interval of range values that will be mapped to the domain.
Returns: projection
Return type:
-
toyplot.projection.
log
(base, domain_min, domain_max, range_min, range_max, linear_domain_min=-1, linear_domain_max=1)[source]¶ Return an instance of
toyplot.projection.Piecewise
that performs a log projection.The returned projection will work correctly with both positive, negative, and zero domain values. To support mapping zero, the projection will switch from log projection to a linear projection within a user-defined region around the origin.
Parameters: - base (number) – Logarithmic base used to map from domain values to range values.
- domain_min, domain_max (number) – Defines a closed interval of domain values that will be mapped to the range.
- range_min, range_max (number) – Defines a closed interval of range values that will be mapped to the domain.
- linear_domain_min, linear_domain_max (number, optional) – Defines an interval of domain values around the origin that will be mapped linearly.
Returns: projection
Return type: