void plplot_plot_hist( plot_driver_type * driver, const char * label , double_vector_type * x , line_attribute_type line_attr) {
int size = double_vector_size( x );
plplot_setup_linestyle( line_attr );
{
int bins = (int) sqrt( size );
double xmin = double_vector_get_min( x );
double xmax = double_vector_get_max( x );
{
/*
Could for some fuxxxing reason not get the plhist() function
to work, and had to resort to the low level plbin function.
*/
double * limits = util_calloc(bins + 1 , sizeof * limits );
double * x_ = util_calloc(bins , sizeof * x_ );
double * y_ = util_calloc(bins , sizeof * y_ );
int i;
double delta = (xmax - xmin) / bins;
for (i= 0; i <= bins; i++)
limits[i] = xmin + i*delta;
for (i=0; i < bins; i++) {
y_[i] = 0;
x_[i] = 0.50 * (limits[i] + limits[i + 1]);
}
for (i=0; i < size; i++) {
double value = double_vector_iget(x , i);
int j;
for (j = 1; j <= bins; j++)
if (value < limits[j]) {
y_[j-1]++;
break;
}
}
/*
for (i = 0; i < bins; i++)
printf("x[%d] = %g y[%d] = %g\n",i,x_[i],i,y_[i]);
*/
plbin(bins , x_ , y_ , PL_BIN_CENTRED + PL_BIN_NOEXPAND);
free(x_);
free(y_);
free(limits);
}
//plhist(size , double_vector_get_ptr(d->x) , xmin , xmax , bins , 0 /* PL_HIST_DEFAULT */);
}
}
/*
* Plot a histogram of prebinned data. X values are int32_t's, and the corresponding
* Y values - the counts for each X - are uint32_t's.
*/
int plplotBins(
uint32_t numBins,
const int32_t *x, /* numBins of X values, monotonically increasing */
const uint32_t *y, /* numBins of Y values for each associated X */
const char *graphName,
const char *fileName,
const char *xAxisName, /* optional */
const char *yAxisName) /* optional */
{
char tmpFile[TEMP_FN_LEN];
makeTempFile(tmpFile, TEMP_FN_LEN);
PLINT totalBins = numBins + 2;
/* PLFLT array of sample values */
PLFLT *xf = (PLFLT *)malloc(totalBins * sizeof(PLFLT));
/* these two will have Y values of zero */
xf[0] = x[0] - 1;
xf[totalBins - 1] = x[numBins-1] + 1;
const int32_t *ip = x;
PLFLT *op = xf + 1;
for(uint32_t dex=0; dex<numBins; dex++) {
*op++ = *ip++;
}
/* PLFLT array of bins */
PLFLT *yf = (PLFLT *)malloc(totalBins * sizeof(PLFLT));
yf[0] = 0.0;
yf[totalBins - 1] = 0.0;
const uint32_t *uip = y;
op = yf + 1;
for(uint32_t dex=0; dex<numBins; dex++) {
*op++ = *uip++;
}
/* get max Y value */
uint32_t maxY = 0;
uip = y;
for(uint32_t dex=0; dex<numBins; dex++) {
uint32_t currY = *uip++;
if(currY > maxY) {
maxY = currY;
}
}
const char *yName = yAxisName ? yAxisName : "";
const char *xName = xAxisName ? xAxisName : "";
#if HIST_COLOR
plsdev ("psc");
plscolbg(255, 255, 255); /* white background */
#else
plsdev ("ps");
#endif
plsfnam(tmpFile);
plsdiori(1.0); // portrait
plinit();
plenv(xf[0], xf[totalBins - 1], 0, maxY, 0, 0);
#if HIST_COLOR
/* can we alter colors of lines and the spaces inside the histograms? */
plscolbg(255, 0, 0); /* red background */
plscol0(1, 255, 0, 0); /* red foreground - no effect */
#endif
pllab(xName, yName, graphName);
plbin(totalBins, xf, yf, PL_BIN_CENTRED);
plend();
free(xf);
free(yf);
int ourRtn = psToPdf(tmpFile, fileName);
unlink(tmpFile);
return ourRtn;
}
/*
* Plot a histogram showing the number of occurences of each possible
* value of 'samples'.
*/
int plplotHist(
const int32_t *samples,
uint32_t numSamples,
const char *graphName,
const char *fileName,
const char *xAxisName, /* optional */
const char *yAxisName) /* optional */
{
char tmpFile[TEMP_FN_LEN];
makeTempFile(tmpFile, TEMP_FN_LEN);
/* First determine the range, i.e. the number of bins */
int32_t minSamp = samples[0];
int32_t maxSamp = samples[0];
for(uint32_t dex=0; dex<numSamples; dex++) {
int32_t s = samples[dex];
if(s < minSamp) {
minSamp = s;
}
if(s > maxSamp) {
maxSamp = s;
}
}
/* When we specify PL_BIN_CENTRED, the min and max values are half the normal width */
minSamp--;
maxSamp++;
PLINT numBins = maxSamp - minSamp + 1;
/* One array containing the sample values, x */
PLFLT *x = (PLFLT *)malloc(numBins * sizeof(PLFLT));
int32_t binNum = minSamp;
for(uint32_t dex=0; dex<(uint32_t)numBins; dex++) {
x[dex] = binNum++;
}
/* Now make and fill the bins proper */
PLFLT *y = (PLFLT *)malloc(numBins * sizeof(PLFLT));
for(uint32_t dex=0; dex<(uint32_t)numBins; dex++) {
y[dex] = 0;
}
PLFLT maxY = 0.0;
for(uint32_t dex=0; dex<numSamples; dex++) {
int32_t s = samples[dex];
PLFLT *yp = y + s - minSamp;
*yp += 1.0;
if(*yp > maxY) {
maxY = *yp;
}
}
const char *yName = yAxisName ? yAxisName : "";
const char *xName = xAxisName ? xAxisName : "";
#if HIST_COLOR
plsdev ("psc");
plscolor(1);
plscolbg(255, 255, 255); /* white background */
#else
plsdev ("ps");
#endif
plsfnam(tmpFile);
plsdiori(1.0); // portrait
plinit();
plenv(minSamp, maxSamp, 0, maxY, 0, 0);
#if HIST_COLOR
/* can we alter colors of lines and the spaces inside the histograms? */
plscolbg(255, 0, 0); /* red background */
plscol0(1, 255, 0, 0); /* red foreground - no effect */
#endif
pllab(xName, yName, graphName);
plbin(numBins, x, y, PL_BIN_CENTRED);
plend();
free(x);
free(y);
int ourRtn = psToPdf(tmpFile, fileName);
unlink(tmpFile);
return ourRtn;
}