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## mpX_TIME

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jimmigoo
2009-05-18
2013-05-02

• jimmigoo
2009-05-18

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?

Francesco

• Nigel Paton
2009-05-27

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