Changeset 2576

Timestamp:

06/26/12 17:40:25 (12 years ago)

Author:

Kana Sugimoto

Message:

New Development: Yes

JIRA Issue: Yes (CAS-1814/ATNF Trac #271)

Ready for Test: Yes

Interface Changes: Yes

What Interface Changed: added a new method, asapplotter.plotgrid

Test Programs:

Put in Release Notes: No

Module(s): asapplotter, sdplot

Description:

Added a new method, plotgrid, in the asapplotter class.
The methods samples spectra in a scantable by sky position recorded in
the DIRECTION column and plot them. User can specify center and spacing in
sky position to sample spectra. The number of spectra to be sampled in
horizontal (R.A.) and vertical (Dec.) direction should be specified as well.
An example of usage is,

import asap as sd
scan = sd.scantable("SOME_NAME",average=False)
sd.asapplotter.plotgrid(scan,center=(-3.133363,-0.329469),spacing=(-0.000272,-0.000257),rows=8,cols=8)

This example will sample 8x8 spectra and plot them by sky position.
So far, center and spacing should be defined in the unit of DIRECTION column.

File:

• trunk/python/asapplotter.py (modified) (8 diffs)

trunk/python/asapplotter.py

@@ -1276 +1276 @@
             PL.gcf().canvas.switch_backends(FigureCanvasAgg)
         self._data = scan
-        self._outfile = outfile
         dates = self._data.get_time(asdatetime=True)
         t = PL.date2num(dates)
@@ -1284 +1283 @@
         PL.clf()
         # Adjust subplot margins
-        if len(self._margins) != 6:
+        if not self._margins or len(self._margins) != 6:
             self.set_margin(refresh=False)
         lef, bot, rig, top, wsp, hsp = self._margins
@@ -1362 +1361 @@
         PL.draw()
         if matplotlib.get_backend() == 'Qt4Agg': PL.gcf().show()
-        if (self._outfile is not None):
-           PL.savefig(self._outfile)
+        if (outfile is not None):
+           PL.savefig(outfile)
 
     def plotpointing(self, scan=None, outfile=None):
@@ -1377 +1376 @@
             PL.gcf().canvas.switch_backends(FigureCanvasAgg)
         self._data = scan
-        self._outfile = outfile
         dir = array(self._data.get_directionval()).transpose()
         ra = dir[0]*180./pi
@@ -1385 +1383 @@
         PL.clf()
         # Adjust subplot margins
-        if len(self._margins) != 6:
+        if not self._margins or len(self._margins) != 6:
             self.set_margin(refresh=False)
         lef, bot, rig, top, wsp, hsp = self._margins
@@ -1403 +1401 @@
         PL.draw()
         if matplotlib.get_backend() == 'Qt4Agg': PL.gcf().show()
-        if (self._outfile is not None):
-           PL.savefig(self._outfile)
+        if (outfile is not None):
+           PL.savefig(outfile)
 
     # plot total power data
     # plotting in time is not yet implemented..
     @asaplog_post_dec
-    def plottp(self, scan=None, outfile=None):
+    def plottp(self, scan=None):
         self._assert_plotter(action="reload")
         self._plotter.hold()
@@ -1434 +1432 @@
 
         # Adjust subplot margins
-        if len(self._margins) !=6: self.set_margin(refresh=False)
+        if not self._margins or len(self._margins) !=6:
+            self.set_margin(refresh=False)
         lef, bot, rig, top, wsp, hsp = self._margins
         self._plotter.figure.subplots_adjust(
@@ -1583 +1582 @@
             self._plotter.release()
         self._reset_header()
+
+    # plot spectra by pointing
+    @asaplog_post_dec
+    def plotgrid(self, scan=None,center=None,spacing=None,rows=None,cols=None):
+        """
+        Plot spectra based on direction.
+        
+        Parameters:
+            scan:      a scantable to plot
+            center:    the grid center direction (a list) of plots in the
+                       unit of DIRECTION column.
+                       (default) the center of map region
+            spacing:   a list of horizontal (R.A.) and vertical (Dec.)
+                       spacing in the unit of DIRECTION column.
+                       (default) Calculated by the extent of map region and
+                       the number of rows and cols to cover
+            rows:      number of panels (grid points) in horizontal direction
+            cols:      number of panels (grid points) in vertical direction
+
+        Note:
+        - Only the first IFNO, POLNO, and BEAM in the scantable will be
+        plotted.
+        - This method doesn't re-grid and average spectra in scantable. Use
+        asapgrid module to re-grid spectra before plotting with this method.
+        Only the first spectrum is plotted in case there are multiple
+        spectra which belong to a grid.
+        """
+        from asap import scantable
+        from numpy import array, ma
+        if not self._data and not scan:
+            msg = "No scantable is specified to plot"
+            raise TypeError(msg)
+        if isinstance(scan, scantable):
+            if self._data is not None:
+                if scan != self._data:
+                    self._data = scan
+                    # reset
+                    self._reset()
+            else:
+                self._data = scan
+                self._reset()
+        elif not self._data:
+            msg = "Input is not a scantable"
+            raise TypeError(msg)
+        
+        # Rows and cols
+        if rows:
+            self._rows = int(rows)
+        else:
+            msg = "Number of rows to plot are not specified. "
+            if self._rows:
+                msg += "Using previous value = %d" % (self._rows)
+                asaplog.push(msg)
+            else:
+                self._rows = 1
+                msg += "Setting rows = %d" % (self._rows)
+                asaplog.post()
+                asaplog.push(msg)
+                asaplog.post("WARN")
+        if cols:
+            self._cols = int(cols)
+        else:
+            msg = "Number of cols to plot are not specified. "
+            if self._cols:
+                msg += "Using previous value = %d" % (self._cols)
+                asaplog.push(msg)
+            else:
+                self._cols = 1
+                msg += "Setting cols = %d" % (self._cols)
+                asaplog.post()
+                asaplog.push(msg)
+                asaplog.post("WARN")
+
+        # Center and spacing
+        if type(center) == list and len(center) > 1:
+            center = center[0:2]
+        else:
+            asaplog.post()
+            asaplog.push("Grid center is not specified. Automatically calculated from pointing center.")
+            asaplog.post("WARN")
+            dirarr = array(self._data.get_directionval()).transpose()
+            #center = [dirarr[0].mean(), dirarr[1].mean()]
+            center = [0.5*(dirarr[0].max() + dirarr[0].min()),
+                      0.5*(dirarr[1].max() + dirarr[1].min())]
+            del dirarr
+        asaplog.push("Grid center: (%f, %f) " % (center[0],center[1]))
+
+        if spacing is None:
+            asaplog.post()
+            asaplog.push("Grid spacing not specified. Automatically calculated from map coverage")
+            asaplog.post("WARN")
+            # automatically get spacing
+            dirarr = array(self._data.get_directionval()).transpose()
+            wx = 2. * max(abs(dirarr[0].max()-center[0]),
+                          abs(dirarr[0].min()-center[0]))
+            wy = 2. * max(abs(dirarr[1].max()-center[1]),
+                          abs(dirarr[1].min()-center[1]))
+            # slightly expand area to plot the edges
+            wx *= 1.01
+            wy *= 1.01
+            xgrid = wx/self._cols
+            ygrid = wy/self._rows
+            print "Pointing range: (x, y) = (%f - %f, %f - %f)" %\
+              (dirarr[0].min(),dirarr[0].max(),dirarr[1].min(),dirarr[1].max())
+            # identical R.A. and/or Dec. for all spectra.
+            if xgrid == 0:
+                xgrid = 1.
+            if ygrid == 0:
+                ygrid = 1.
+            # spacing should be negative to transpose plot
+            spacing = [- xgrid, - ygrid]
+            del dirarr, xgrid, ygrid
+        #elif isinstance(spacing, str):
+        #    # spacing is a quantity
+        elif isinstance(spacing,list) and len(spacing) > 1:
+            for val in spacing[0:2]:
+                if not isinstance(val, str):
+                    raise TypeError("spacing should be a list of float")
+            spacing = spacing[0:2]
+        else:
+            msg = "Invalid spacing."
+            raise TypeError(msg)
+        asaplog.push("Spacing: (%f, %f) " % (spacing[0],spacing[1]))
+
+        ntotpl = self._rows * self._cols
+        minpos = [center[0]-spacing[0]*self._cols/2.,
+                  center[1]-spacing[1]*self._rows/2.]
+        #xbound = [center[0]-spacing[0]*self._cols/2.,
+        #          center[0]+spacing[0]*self._cols/2.]
+        #ybound = [center[1]-spacing[1]*self._rows/2.,
+        #          center[1]+spacing[1]*self._rows/2.]
+        print "Plot range: (x, y) = (%f - %f, %f - %f)" %\
+              (minpos[0],minpos[0]+spacing[0]*self._cols,
+               minpos[1],minpos[1]+spacing[1]*self._rows)
+        #      (xbound[0],xbound[1],ybound[0],ybound[1])
+        ifs = self._data.getifnos()
+        if len(ifs) > 1:
+            msg = "Found multiple IFs in scantable. Only the first IF (IFNO=%d) will be plotted." % ifs[0]
+            asaplog.post()
+            asaplog.push(msg)
+            asaplog.post("WARN")
+        pols = self._data.getpolnos()
+        if len(pols) > 1:
+            msg = "Found multiple POLs in scantable. Only the first POL (POLNO=%d) will be plotted." % pols[0]
+            asaplog.post()
+            asaplog.push(msg)
+            asaplog.post("WARN")
+        beams = self._data.getbeamnos()
+        if len(beams) > 1:
+            msg = "Found multiple BEAMs in scantable. Only the first BEAM (BEAMNO=%d) will be plotted." % beams[0]
+            asaplog.post()
+            asaplog.push(msg)
+            asaplog.post("WARN")
+        self._data.set_selection(ifs=[ifs[0]],pols=[pols[0]],beams=[beams[0]])
+        if self._data.nrow() > ntotpl:
+            msg = "Scantable is finely sampled than plotting grids. "\
+                  + "Only the first spectrum is plotted in each grid."
+            asaplog.post()
+            asaplog.push(msg)
+            asaplog.post("WARN")
+        
+        self._assert_plotter(action="reload")
+        self._plotter.hold()
+        self._plotter.clear()
+        
+        # Adjust subplot margins
+        if not self._margins or len(self._margins) !=6:
+            self.set_margin(refresh=False)
+        self._plotter.set_panels(rows=self._rows,cols=self._cols,
+                                 nplots=ntotpl,margin=self._margins,ganged=True)
+        if self.casabar_exists(): self._plotter.figmgr.casabar.disable_button()
+        # Actual plot
+        npl = 0
+        for irow in range(self._data.nrow()):
+            pos = self._data.get_directionval(irow)
+            ix = int((pos[0] - minpos[0])/spacing[0])
+            #if pos[0] < xbound[0] or pos[0] > xbound[1]:
+            if ix < 0 or ix >= self._cols:
+                print "Row %d : Out of X-range (x = %f) ... skipped" % (irow, pos[0])
+                continue
+            #ix = min(int((pos[0] - xbound[0])/spacing[0]),self._cols)
+            iy = int((pos[1]- minpos[1])/spacing[1])
+            #if pos[1] < ybound[0] or pos[1] > ybound[1]:
+            if iy < 0 or iy >= self._cols:
+                print "Row %d : Out of Y-range (y = %f) ... skipped" % (irow,pos[1])
+                continue
+            #iy = min(int((pos[1]- ybound[0])/spacing[1]),self._rows)
+            ipanel = ix + iy*self._cols
+            if len(self._plotter.subplots[ipanel]['lines']) > 0:
+                print "Row %d : panel %d lready plotted ... skipped" % (irow,ipanel)
+                # a spectrum already plotted in the panel
+                continue
+            # Plotting this row
+            print "PLOTTING row %d (panel=%d)" % (irow, ipanel)
+            npl += 1
+            self._plotter.subplot(ipanel)
+            self._plotter.palette(0)
+            xlab = self._abcissa and self._abcissa[ipanel] \
+                   or scan._getabcissalabel(irow)
+            if self._offset and not self._abcissa:
+                xlab += " (relative)"
+            ylab = self._ordinate and self._ordinate[ipanel] \
+                   or scan._get_ordinate_label()
+            self._plotter.set_axes('xlabel', xlab)
+            self._plotter.set_axes('ylabel', ylab)
+            #from numpy import pi
+            #lbl = "(%f, %f)" % (self._data.get_directionval(irow)[0]*180/pi,self._data.get_directionval(irow)[1]*180./pi)
+            lbl = self._data.get_direction(irow)
+            self._plotter.set_axes('title',lbl)
+
+            y = scan._getspectrum(irow)
+            # flag application
+            mr = scan._getflagrow(irow)
+            if mr:  # FLAGROW=True
+                y = ma.masked_array(y,mask=mr)
+            else:
+                m = scan._getmask(irow)
+                from numpy import logical_not, logical_and
+                ### user mask is not available so far
+                #if self._maskselection and len(self._usermask) == len(m):
+                #    if d[self._stacking](irow) in self._maskselection[self._stacking]:
+                #            m = logical_and(m, self._usermask)
+                y = ma.masked_array(y,mask=logical_not(array(m,copy=False)))
+
+            x = array(scan._getabcissa(irow))
+            if self._offset:
+                x += self._offset
+            if self._minmaxx is not None:
+                s,e = self._slice_indeces(x)
+                x = x[s:e]
+                y = y[s:e]
+            if len(x) > 1024 and rcParams['plotter.decimate']:
+                fac = len(x)/1024
+                x = x[::fac]
+                y = y[::fac]
+            self._plotter.set_line(label=lbl)
+            plotit = self._plotter.plot
+            if self._hist: plotit = self._plotter.hist
+            if len(x) > 0 and not mr:
+                plotit(x,y)
+#                 xlim= self._minmaxx or [min(x),max(x)]
+#                 allxlim += xlim
+#                 ylim= self._minmaxy or [ma.minimum(y),ma.maximum(y)]
+#                 allylim += ylim
+#             else:
+#                 xlim = self._minmaxx or []
+#                 allxlim += xlim
+#                 ylim= self._minmaxy or []
+#                 allylim += ylim
+            
+            if npl >= ntotpl:
+                break
+            
+        #self._plottp(self._data)
+
+        if self._minmaxy is not None:
+            self._plotter.set_limits(ylim=self._minmaxy)
+        self._plotter.release()
+        self._plotter.tidy()
+        self._plotter.show(hardrefresh=False)
+        return