mpX_TIME

[jimmigoo]

Hi everybody!
I would like to understand how can I insert exact time values on X labels.
If I use mpX_TIME option, I cannot read exactly times. I've done some routines
that transform my sec85 seconds tick number (from 1-1-1985 to the exact time of acquisition) in 3 numbers,
representing hour, minutes, seconds. But I cannot insert these three values on X labels.
Does anybody know how to do this thing?

Thanks in advice!

Francesco

[Nigel Paton]

Hi,

It takes the x labels from the value of the X coordinate. So the x coordinate needs to be the time expressed in seconds. See mpScaleX::Plot() in mathplot.cpp in particular this code:

                if ((m_labelType == mpX_TIME) || (m_labelType == mpX_HOURS)) {
                    double modulus = fabs(n);
                    double sign = n/modulus;
                    double hh = floor(modulus/3600);
                    double mm = floor((modulus - hh*3600)/60);
                    double ss = modulus - hh*3600 - mm*60;
    #ifdef MATHPLOT_DO_LOGGING
                    wxLogMessage(wxT("%02.0f Hours, %02.0f minutes, %02.0f seconds"), sign*hh, mm, ss);
    #endif // MATHPLOT_DO_LOGGING
                    if (fmt.Len() == 20) // Format with hours has 11 chars
                        s.Printf(fmt, sign*hh, mm, floor(ss));
                    else
                        s.Printf(fmt, sign*mm, ss);
                }

The n variable is the current x value it is going to convert into a tick label on the x axis.

Cheers

Nigel