Allow plotting models in flux, changed model.plot_lc() and ._get_lc()

source/MulensModel/model.py

@@ -301,9 +301,9 @@ def _parse_fluxes_for_get_lc(self, source_flux, source_flux_ratio,
         return (source_flux, source_flux_ratio, blend_flux)
 
     def _get_lc(self, times, t_range, t_start, t_stop, dt, n_epochs, gamma,
-                source_flux, blend_flux, return_times=False):
+                source_flux, blend_flux, return_times=False, phot_fmt="mag"):
         """
-        calculate magnitudes without making checks on input parameters
+        calculate magnitude or flux without making checks on input parameters
 
         source_flux is a *float* (for single source model) or
         an iterable (for multiple sources)
@@ -329,20 +329,34 @@ def _get_lc(self, times, t_range, t_start, t_stop, dt, n_epochs, gamma,
 
             flux += blend_flux
 
-        magnitudes = Utils.get_mag_from_flux(flux)
+        return self._return_mag_or_flux(times, flux, return_times, phot_fmt)
+
+    def _return_mag_or_flux(self, times, flux, return_times, phot_fmt):
+        """
+        Obtain what is returned in function _get_lc, where phot_fmt and
+        return_times are explicitly given
+        """
+        if phot_fmt == 'mag':
+            mag_or_flux = Utils.get_mag_from_flux(flux)
+        elif phot_fmt == 'flux':
+            mag_or_flux = flux
+        else:
+            raise ValueError(
+                'phot_fmt must be one of "mag", "flux", or "scaled". Your ' +
+                'value: {0}'.format(phot_fmt))
 
         if return_times:
-            return (times, magnitudes)
+            return (times, mag_or_flux)
         else:
-            return magnitudes
+            return mag_or_flux
 
     def plot_lc(
             self, times=None, t_range=None, t_start=None, t_stop=None,
             dt=None, n_epochs=None, source_flux=None, blend_flux=None,
             source_flux_ratio=None, gamma=None, bandpass=None,
             subtract_2450000=False, subtract_2460000=False,
             data_ref=None, flux_ratio_constraint=None,
-            fit_blending=None, f_source=None, f_blend=None,
+            fit_blending=None, f_source=None, f_blend=None, phot_fmt="mag",
             **kwargs):
         """
         Plot the model light curve in magnitudes.
@@ -379,6 +393,10 @@ def plot_lc(
             f_source, f_blend: DEPRECATED
                 use *source_flux* or *blend_flux* instead.
 
+            phot_fmt: *str*
+                Specifies whether the photometry is plotted in magnitude or
+                flux space. Accepts either 'mag' or 'flux'. Default = 'mag'.
+
             ``**kwargs``:
                 any arguments accepted by :py:func:`matplotlib.pyplot.plot()`.
         """
@@ -416,24 +434,16 @@ def plot_lc(
         gamma = self._get_limb_coeff_gamma(bandpass, gamma)
         self._check_gamma_for_2_sources(gamma)
 
-        (times, magnitudes) = self._get_lc(
+        (times, mag_or_flux) = self._get_lc(
             times=times, t_range=t_range, t_start=t_start, t_stop=t_stop,
             dt=dt, n_epochs=n_epochs, gamma=gamma, source_flux=source_flux,
-            blend_flux=blend_flux, return_times=True)
+            blend_flux=blend_flux, return_times=True, phot_fmt=phot_fmt)
 
         subtract = PlotUtils.find_subtract(subtract_2450000=subtract_2450000,
                                            subtract_2460000=subtract_2460000)
 
-        self._plt_plot(times-subtract, magnitudes, kwargs)
-        plt.ylabel('Magnitude')
-        plt.xlabel(
-            PlotUtils.find_subtract_xlabel(
-                subtract_2450000=subtract_2450000,
-                subtract_2460000=subtract_2460000))
-
-        (ymin, ymax) = plt.gca().get_ylim()
-        if ymax > ymin:
-            plt.gca().invert_yaxis()
+        self._plt_plot(times-subtract, mag_or_flux, kwargs)
+        self._plot_axes(phot_fmt, subtract_2450000, subtract_2460000)
 
     def _plt_plot(self, x, y, kwargs):
         """
@@ -446,6 +456,23 @@ def _plt_plot(self, x, y, kwargs):
             print(kwargs)
             raise
 
+    def _plot_axes(self, phot_fmt, subtract_2450000, subtract_2460000):
+        """
+        Adjust axes labels and ranges, given the inputs phot_fmt and subtract
+        """
+        if phot_fmt == 'mag':
+            plt.ylabel('Magnitude')
+        elif phot_fmt == 'flux':
+            plt.ylabel('Flux')
+        plt.xlabel(
+            PlotUtils.find_subtract_xlabel(
+                subtract_2450000=subtract_2450000,
+                subtract_2460000=subtract_2460000))
+
+        (ymin, ymax) = plt.gca().get_ylim()
+        if ymax > ymin and phot_fmt == 'mag':
+            plt.gca().invert_yaxis()
+
     def plot_caustics(self, n_points=5000, epoch=None, **kwargs):
         """
         Plot the caustic structure. See

source/MulensModel/version.py

@@ -1 +1 @@
-__version__ = "2.21.5"
+__version__ = "2.22.0"