Date: 2021-03-03T22:25:37+00:00

Actual source code: dscatter.c
petsc-3.14.5 2021-03-03
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      2: /*
      3:        Contains the data structure for drawing scatter plots
      4:     graphs in a window with an axis. This is intended for scatter
      5:     plots that change dynamically.
      6: */

      8: #include <petscdraw.h>
      9: #include <petsc/private/petscimpl.h>

     11: PetscClassId PETSC_DRAWSP_CLASSID = 0;

     13: struct _p_PetscDrawSP {
     14:   PETSCHEADER(int);
     15:   PetscErrorCode (*destroy)(PetscDrawSP);
     16:   PetscErrorCode (*view)(PetscDrawSP,PetscViewer);
     17:   int            len,loc;
     18:   PetscDraw      win;
     19:   PetscDrawAxis  axis;
     20:   PetscReal      xmin,xmax,ymin,ymax,*x,*y;
     21:   int            nopts,dim;
     22: };

     24: #define CHUNCKSIZE 100

     26: /*@C
     27:     PetscDrawSPCreate - Creates a scatter plot data structure.

     29:     Collective on PetscDraw

     31:     Input Parameters:
     32: +   win - the window where the graph will be made.
     33: -   dim - the number of sets of points which will be drawn

     35:     Output Parameters:
     36: .   drawsp - the scatter plot context

     38:    Level: intermediate

     40:    Notes:
     41:     Add points to the plot with PetscDrawSPAddPoint() or PetscDrawSPAddPoints(); the new points are not displayed until PetscDrawSPDraw() is called.

     43:    PetscDrawSPReset() removes all the points that have been added

     45:    The MPI communicator that owns the PetscDraw owns this PetscDrawSP, but the calls to set options and add points are ignored on all processes except the
     46:    zeroth MPI process in the communicator. All MPI processes in the communicator must call PetscDrawSPDraw() to display the updated graph.

     48: .seealso:  PetscDrawLGCreate(), PetscDrawLG, PetscDrawBarCreate(), PetscDrawBar, PetscDrawHGCreate(), PetscDrawHG, PetscDrawSPDestroy(), PetscDraw, PetscDrawSP, PetscDrawSPSetDimension(), PetscDrawSPReset(),
     49:            PetscDrawSPAddPoint(), PetscDrawSPAddPoints(), PetscDrawSPDraw(), PetscDrawSPSave(), PetscDrawSPSetLimits(), PetscDrawSPGetAxis(),PetscDrawAxis, PetscDrawSPGetDraw()
     50: @*/
     51: PetscErrorCode  PetscDrawSPCreate(PetscDraw draw,int dim,PetscDrawSP *drawsp)
     52: {
     53:   PetscDrawSP    sp;

     61:   PetscHeaderCreate(sp,PETSC_DRAWSP_CLASSID,"DrawSP","Scatter Plot","Draw",PetscObjectComm((PetscObject)draw),PetscDrawSPDestroy,NULL);
     62:   PetscLogObjectParent((PetscObject)draw,(PetscObject)sp);

     64:   PetscObjectReference((PetscObject)draw);
     65:   sp->win = draw;

     67:   sp->view    = NULL;
     68:   sp->destroy = NULL;
     69:   sp->nopts   = 0;
     70:   sp->dim     = dim;
     71:   sp->xmin    = 1.e20;
     72:   sp->ymin    = 1.e20;
     73:   sp->xmax    = -1.e20;
     74:   sp->ymax    = -1.e20;

     76:   PetscMalloc2(dim*CHUNCKSIZE,&sp->x,dim*CHUNCKSIZE,&sp->y);
     77:   PetscLogObjectMemory((PetscObject)sp,2*dim*CHUNCKSIZE*sizeof(PetscReal));

     79:   sp->len     = dim*CHUNCKSIZE;
     80:   sp->loc     = 0;

     82:   PetscDrawAxisCreate(draw,&sp->axis);
     83:   PetscLogObjectParent((PetscObject)sp,(PetscObject)sp->axis);

     85:   *drawsp = sp;
     86:   return(0);
     87: }

     89: /*@
     90:    PetscDrawSPSetDimension - Change the number of sets of points  that are to be drawn.

     92:    Logically Collective on PetscDrawSP

     94:    Input Parameter:
     95: +  sp - the line graph context.
     96: -  dim - the number of curves.

     98:    Level: intermediate

    100: .seealso: PetscDrawSP, PetscDrawSPCreate(), PetscDrawSPAddPoint(), PetscDrawSPAddPoints()

    102: @*/
    103: PetscErrorCode  PetscDrawSPSetDimension(PetscDrawSP sp,int dim)
    104: {

    110:   if (sp->dim == dim) return(0);

    112:   PetscFree2(sp->x,sp->y);
    113:   sp->dim = dim;
    114:   PetscMalloc2(dim*CHUNCKSIZE,&sp->x,dim*CHUNCKSIZE,&sp->y);
    115:   PetscLogObjectMemory((PetscObject)sp,2*dim*CHUNCKSIZE*sizeof(PetscReal));
    116:   sp->len = dim*CHUNCKSIZE;
    117:   return(0);
    118: }

    120: /*@
    121:    PetscDrawSPReset - Clears line graph to allow for reuse with new data.

    123:    Logically Collective on PetscDrawSP

    125:    Input Parameter:
    126: .  sp - the line graph context.

    128:    Level: intermediate

    130: .seealso: PetscDrawSP, PetscDrawSPCreate(), PetscDrawSPAddPoint(), PetscDrawSPAddPoints(), PetscDrawSPDraw()
    131: @*/
    132: PetscErrorCode  PetscDrawSPReset(PetscDrawSP sp)
    133: {
    136:   sp->xmin  = 1.e20;
    137:   sp->ymin  = 1.e20;
    138:   sp->xmax  = -1.e20;
    139:   sp->ymax  = -1.e20;
    140:   sp->loc   = 0;
    141:   sp->nopts = 0;
    142:   return(0);
    143: }

    145: /*@C
    146:    PetscDrawSPDestroy - Frees all space taken up by scatter plot data structure.

    148:    Collective on PetscDrawSP

    150:    Input Parameter:
    151: .  sp - the line graph context

    153:    Level: intermediate

    155: .seealso:  PetscDrawSPCreate(), PetscDrawSP, PetscDrawSPReset()

    157: @*/
    158: PetscErrorCode  PetscDrawSPDestroy(PetscDrawSP *sp)
    159: {

    163:   if (!*sp) return(0);
    165:   if (--((PetscObject)(*sp))->refct > 0) {*sp = NULL; return(0);}

    167:   PetscFree2((*sp)->x,(*sp)->y);
    168:   PetscDrawAxisDestroy(&(*sp)->axis);
    169:   PetscDrawDestroy(&(*sp)->win);
    170:   PetscHeaderDestroy(sp);
    171:   return(0);
    172: }

    174: /*@
    175:    PetscDrawSPAddPoint - Adds another point to each of the scatter plots.

    177:    Logically Collective on PetscDrawSP

    179:    Input Parameters:
    180: +  sp - the scatter plot data structure
    181: -  x, y - the points to two vectors containing the new x and y
    182:           point for each curve.

    184:    Level: intermediate

    186:    Notes:
    187:     the new points will not be displayed until a call to PetscDrawSPDraw() is made

    189: .seealso: PetscDrawSPAddPoints(), PetscDrawSP, PetscDrawSPCreate(), PetscDrawSPReset(), PetscDrawSPDraw()

    191: @*/
    192: PetscErrorCode  PetscDrawSPAddPoint(PetscDrawSP sp,PetscReal *x,PetscReal *y)
    193: {
    195:   PetscInt       i;

    200:   if (sp->loc+sp->dim >= sp->len) { /* allocate more space */
    201:     PetscReal *tmpx,*tmpy;
    202:     PetscMalloc2(sp->len+sp->dim*CHUNCKSIZE,&tmpx,sp->len+sp->dim*CHUNCKSIZE,&tmpy);
    203:     PetscLogObjectMemory((PetscObject)sp,2*sp->dim*CHUNCKSIZE*sizeof(PetscReal));
    204:     PetscArraycpy(tmpx,sp->x,sp->len);
    205:     PetscArraycpy(tmpy,sp->y,sp->len);
    206:     PetscFree2(sp->x,sp->y);
    207:     sp->x    = tmpx;
    208:     sp->y    = tmpy;
    209:     sp->len += sp->dim*CHUNCKSIZE;
    210:   }
    211:   for (i=0; i<sp->dim; i++) {
    212:     if (x[i] > sp->xmax) sp->xmax = x[i];
    213:     if (x[i] < sp->xmin) sp->xmin = x[i];
    214:     if (y[i] > sp->ymax) sp->ymax = y[i];
    215:     if (y[i] < sp->ymin) sp->ymin = y[i];

    217:     sp->x[sp->loc]   = x[i];
    218:     sp->y[sp->loc++] = y[i];
    219:   }
    220:   sp->nopts++;
    221:   return(0);
    222: }

    225: /*@C
    226:    PetscDrawSPAddPoints - Adds several points to each of the scatter plots.

    228:    Logically Collective on PetscDrawSP

    230:    Input Parameters:
    231: +  sp - the LineGraph data structure
    232: .  xx,yy - points to two arrays of pointers that point to arrays
    233:            containing the new x and y points for each curve.
    234: -  n - number of points being added

    236:    Level: intermediate

    238:    Notes:
    239:     the new points will not be displayed until a call to PetscDrawSPDraw() is made

    241: .seealso: PetscDrawSPAddPoint(), PetscDrawSP, PetscDrawSPCreate(), PetscDrawSPReset(), PetscDrawSPDraw()
    242: @*/
    243: PetscErrorCode  PetscDrawSPAddPoints(PetscDrawSP sp,int n,PetscReal **xx,PetscReal **yy)
    244: {
    246:   PetscInt       i,j,k;
    247:   PetscReal      *x,*y;

    252:   if (sp->loc+n*sp->dim >= sp->len) { /* allocate more space */
    253:     PetscReal *tmpx,*tmpy;
    254:     PetscInt  chunk = CHUNCKSIZE;
    255:     if (n > chunk) chunk = n;
    256:     PetscMalloc2(sp->len+sp->dim*chunk,&tmpx,sp->len+sp->dim*chunk,&tmpy);
    257:     PetscLogObjectMemory((PetscObject)sp,2*sp->dim*CHUNCKSIZE*sizeof(PetscReal));
    258:     PetscArraycpy(tmpx,sp->x,sp->len);
    259:     PetscArraycpy(tmpy,sp->y,sp->len);
    260:     PetscFree2(sp->x,sp->y);

    262:     sp->x    = tmpx;
    263:     sp->y    = tmpy;
    264:     sp->len += sp->dim*CHUNCKSIZE;
    265:   }
    266:   for (j=0; j<sp->dim; j++) {
    267:     x = xx[j]; y = yy[j];
    268:     k = sp->loc + j;
    269:     for (i=0; i<n; i++) {
    270:       if (x[i] > sp->xmax) sp->xmax = x[i];
    271:       if (x[i] < sp->xmin) sp->xmin = x[i];
    272:       if (y[i] > sp->ymax) sp->ymax = y[i];
    273:       if (y[i] < sp->ymin) sp->ymin = y[i];

    275:       sp->x[k] = x[i];
    276:       sp->y[k] = y[i];
    277:       k       += sp->dim;
    278:     }
    279:   }
    280:   sp->loc   += n*sp->dim;
    281:   sp->nopts += n;
    282:   return(0);
    283: }

    285: /*@
    286:    PetscDrawSPDraw - Redraws a scatter plot.

    288:    Collective on PetscDrawSP

    290:    Input Parameter:
    291: +  sp - the line graph context
    292: -  clear - clear the window before drawing the new plot

    294:    Level: intermediate

    296: .seealso: PetscDrawLGDraw(), PetscDrawLGSPDraw(), PetscDrawSP, PetscDrawSPCreate(), PetscDrawSPReset(), PetscDrawSPAddPoint(), PetscDrawSPAddPoints()

    298: @*/
    299: PetscErrorCode  PetscDrawSPDraw(PetscDrawSP sp, PetscBool clear)
    300: {
    301:   PetscReal      xmin,xmax,ymin,ymax;
    303:   PetscMPIInt    rank;
    304:   PetscBool      isnull;
    305:   PetscDraw      draw;

    309:   PetscDrawIsNull(sp->win,&isnull);
    310:   if (isnull) return(0);
    311:   MPI_Comm_rank(PetscObjectComm((PetscObject)sp),&rank);

    313:   if (sp->xmin > sp->xmax || sp->ymin > sp->ymax) return(0);
    314:   if (sp->nopts < 1) return(0);

    316:   draw = sp->win;
    317:   if (clear) {
    318:     PetscDrawCheckResizedWindow(draw);
    319:     PetscDrawClear(draw);
    320:   }

    322:   xmin = sp->xmin; xmax = sp->xmax; ymin = sp->ymin; ymax = sp->ymax;
    323:   PetscDrawAxisSetLimits(sp->axis,xmin,xmax,ymin,ymax);
    324:   PetscDrawAxisDraw(sp->axis);

    326:   PetscDrawCollectiveBegin(draw);
    327:   if (!rank) {
    328:     int i,j,dim=sp->dim,nopts=sp->nopts;
    329:     for (i=0; i<dim; i++) {
    330:       for (j=0; j<nopts; j++) {
    331:         PetscDrawPoint(draw,sp->x[j*dim+i],sp->y[j*dim+i],PETSC_DRAW_RED);
    332:       }
    333:     }
    334:   }
    335:   PetscDrawCollectiveEnd(draw);

    337:   PetscDrawFlush(draw);
    338:   PetscDrawPause(draw);
    339:   return(0);
    340: }

    342: /*@
    343:    PetscDrawSPSave - Saves a drawn image

    345:    Collective on PetscDrawSP

    347:    Input Parameter:
    348: .  sp - the scatter plot context

    350:    Level: intermediate

    352: .seealso:  PetscDrawSPCreate(), PetscDrawSPGetDraw(), PetscDrawSetSave(), PetscDrawSave()
    353: @*/
    354: PetscErrorCode  PetscDrawSPSave(PetscDrawSP sp)
    355: {

    360:   PetscDrawSave(sp->win);
    361:   return(0);
    362: }

    364: /*@
    365:    PetscDrawSPSetLimits - Sets the axis limits for a scatter plot If more
    366:    points are added after this call, the limits will be adjusted to
    367:    include those additional points.

    369:    Logically Collective on PetscDrawSP

    371:    Input Parameters:
    372: +  xsp - the line graph context
    373: -  x_min,x_max,y_min,y_max - the limits

    375:    Level: intermediate

    377: .seealso: PetscDrawSP, PetscDrawSPCreate(), PetscDrawSPDraw(), PetscDrawSPAddPoint(), PetscDrawSPAddPoints(), PetscDrawSPGetAxis()
    378: @*/
    379: PetscErrorCode  PetscDrawSPSetLimits(PetscDrawSP sp,PetscReal x_min,PetscReal x_max,PetscReal y_min,PetscReal y_max)
    380: {
    383:   sp->xmin = x_min;
    384:   sp->xmax = x_max;
    385:   sp->ymin = y_min;
    386:   sp->ymax = y_max;
    387:   return(0);
    388: }

    390: /*@C
    391:    PetscDrawSPGetAxis - Gets the axis context associated with a line graph.
    392:    This is useful if one wants to change some axis property, such as
    393:    labels, color, etc. The axis context should not be destroyed by the
    394:    application code.

    396:    Not Collective, if PetscDrawSP is parallel then PetscDrawAxis is parallel

    398:    Input Parameter:
    399: .  sp - the line graph context

    401:    Output Parameter:
    402: .  axis - the axis context

    404:    Level: intermediate

    406: .seealso: PetscDrawSP, PetscDrawSPCreate(), PetscDrawSPDraw(), PetscDrawSPAddPoint(), PetscDrawSPAddPoints(), PetscDrawAxis, PetscDrawAxisCreate()

    408: @*/
    409: PetscErrorCode  PetscDrawSPGetAxis(PetscDrawSP sp,PetscDrawAxis *axis)
    410: {
    414:   *axis = sp->axis;
    415:   return(0);
    416: }

    418: /*@C
    419:    PetscDrawSPGetDraw - Gets the draw context associated with a line graph.

    421:    Not Collective, PetscDraw is parallel if PetscDrawSP is parallel

    423:    Input Parameter:
    424: .  sp - the line graph context

    426:    Output Parameter:
    427: .  draw - the draw context

    429:    Level: intermediate

    431: .seealso: PetscDrawSP, PetscDrawSPCreate(), PetscDrawSPDraw(), PetscDraw
    432: @*/
    433: PetscErrorCode  PetscDrawSPGetDraw(PetscDrawSP sp,PetscDraw *draw)
    434: {
    438:   *draw = sp->win;
    439:   return(0);
    440: }