snprintf(buffer,BLC_LINE_MAX,"plot '-' binary format='%s' record=%d using ($0*%f):1 title '%d' with %s",gnuplot_format,history_length,sampling_period/1000000.f,0,with_option);
snprintf(buffer,BLC_LINE_MAX,"plot '-' binary format='%s' record=%zu using ($0*%f):1 title '%d' with %s",gnuplot_format,history_length,sampling_period/1000000.f,0,with_option);
elseEXIT_ON_ERROR("Too many columns. You have '%d' max is 64",columns_nb);
snprintf(buffer,BLC_LINE_MAX,", '-' binary format='%s' record=%d u ($0*%f):1 t '%c' w %s",gnuplot_format,history_length,sampling_period/1000000.f,code,with_option);
snprintf(buffer,BLC_LINE_MAX,", '-' binary format='%s' record=%zu u ($0*%f):1 t '%c' w %s",gnuplot_format,history_length,sampling_period/1000000.f,code,with_option);