Can you instead use a time stamp on each data value? Then when you have no data, just don't write anything.
Scott From: [email protected] [mailto:[email protected]] On Behalf Of Herrero Vincent Sent: Tuesday, October 26, 2010 3:54 AM To: [email protected] Subject: Re: [Hdf-forum] How to write empty or missing values in a dataset ? Joe, Quincey, Thanks for your answers. I will try to see if we can get a "pseudo-null" value for each sensors we are gathering data from. Otherwise I can always define a dataset using a H5T_COMPOUND data type as follow: typedef struct s1_t { unsigned char emitted; // if 0 then no-val float value; } s1_t; s1_tid = H5Tcreate(H5T_COMPOUND, sizeof(s1_t)); H5Tinsert(s1_tid, "emitted", HOFFSET(s1_t, emitted), H5T_NATIVE_UCHAR); H5Tinsert(s1_tid, "value", HOFFSET(s1_t, value), H5T_NATIVE_FLOAT); But this solution is more size consuming. Best Regards, Vincent ________________________________ This e-mail and any files transmitted with it may be proprietary and are intended solely for the use of the individual or entity to whom they are addressed. If you have received this e-mail in error please notify the sender. Please note that any views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of ITT Corporation. The recipient should check this e-mail and any attachments for the presence of viruses. ITT accepts no liability for any damage caused by any virus transmitted by this e-mail.
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