void initialize_colors( void )
{
plscol0( 0, 255, 255, 255 );
plscol0( 1, 0, 0, 0 );
plscol0( 2, 255, 0, 0 );
plscol0a( 3, 0, 0, 255, 0.3 );
}
int plp_init(const char *driver, const char *_title, int _is_complex) {
int i;
if (2*NOF_INPUT_ITF > 1) {
modinfo("Multiple signals are currently displayed in the same plot\n");
}
plsdev(driver);
plinit();
pladv(0);
title = _title;
is_complex = _is_complex;
for (i=0;i<2*NOF_INPUT_ITF;i++) {
legends[i] = (const char*) "";
}
for (i=0;i<INPUT_MAX_SAMPLES;i++) {
t[i] = i;
}
setup_legend();
xlabel = xlabel_def;
ylabel = ylabel_def;
plscol0a( 14, 0, 0, 0, 1);
reset_axis();
return 0;
}
void
plot1( int type, const char *x_label, const char *y_label, const char *alty_label,
const char * legend_text[], const char *title_label, const char *line_label )
{
int i;
static PLFLT freql[101], ampl[101], phase[101];
PLFLT f0, freq;
PLINT nlegend = 2;
PLINT opt_array[2];
PLINT text_colors[2];
PLINT line_colors[2];
PLINT line_styles[2];
PLFLT line_widths[2];
PLINT symbol_numbers[2], symbol_colors[2];
PLFLT symbol_scales[2];
const char *symbols[2];
PLFLT legend_width, legend_height;
pladv( 0 );
// Set up data for log plot
f0 = 1.0;
for ( i = 0; i <= 100; i++ )
{
freql[i] = -2.0 + i / 20.0;
freq = pow( 10.0, freql[i] );
ampl[i] = 20.0 * log10( 1.0 / sqrt( 1.0 + pow( ( freq / f0 ), 2. ) ) );
phase[i] = -( 180.0 / M_PI ) * atan( freq / f0 );
}
plvpor( 0.15, 0.85, 0.1, 0.9 );
plwind( -2.0, 3.0, -80.0, 0.0 );
// Try different axis and labelling styles.
plcol0( 1 );
switch ( type )
{
case 0:
plbox( "bclnst", 0.0, 0, "bnstv", 0.0, 0 );
break;
case 1:
plbox( "bcfghlnst", 0.0, 0, "bcghnstv", 0.0, 0 );
break;
}
// Plot ampl vs freq
plcol0( 2 );
plline( 101, freql, ampl );
plcol0( 2 );
plptex( 1.6, -30.0, 1.0, -20.0, 0.5, line_label );
// Put labels on
plcol0( 1 );
plmtex( "b", 3.2, 0.5, 0.5, x_label );
plmtex( "t", 2.0, 0.5, 0.5, title_label );
plcol0( 2 );
plmtex( "l", 5.0, 0.5, 0.5, y_label );
// For the gridless case, put phase vs freq on same plot
if ( type == 0 )
{
plcol0( 1 );
plwind( -2.0, 3.0, -100.0, 0.0 );
plbox( "", 0.0, 0, "cmstv", 30.0, 3 );
plcol0( 3 );
plline( 101, freql, phase );
plstring( 101, freql, phase, "#(728)" );
plcol0( 3 );
plmtex( "r", 5.0, 0.5, 0.5, alty_label );
}
// Draw a legend
// First legend entry.
opt_array[0] = PL_LEGEND_LINE;
text_colors[0] = 2;
line_colors[0] = 2;
line_styles[0] = 1;
line_widths[0] = 1.;
// note from the above opt_array the first symbol (and box) indices
// do not have to be specified
// Second legend entry.
opt_array[1] = PL_LEGEND_LINE | PL_LEGEND_SYMBOL;
text_colors[1] = 3;
line_colors[1] = 3;
line_styles[1] = 1;
line_widths[1] = 1.;
symbol_colors[1] = 3;
symbol_scales[1] = 1.;
symbol_numbers[1] = 4;
symbols[1] = "#(728)";
// from the above opt_arrays we can completely ignore everything
// to do with boxes.
plscol0a( 15, 32, 32, 32, 0.70 );
pllegend( &legend_width, &legend_height,
PL_LEGEND_BACKGROUND | PL_LEGEND_BOUNDING_BOX, 0,
0.0, 0.0, 0.10, 15,
1, 1, 0, 0,
nlegend, opt_array,
1.0, 1.0, 2.0,
1., text_colors, (const char **) legend_text,
NULL, NULL, NULL, NULL,
line_colors, line_styles, line_widths,
symbol_colors, symbol_scales, symbol_numbers, (const char **) symbols );
}
