CCfits - HEASARC - NASA
CCfits - HEASARC - NASA
CCfits - HEASARC - NASA
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24.39 <strong>CCfits</strong>::PHDU Class Reference 131<br />
Parameters<br />
readFlag read the image data if true<br />
key a vector of strings of keyword names to be read from the primary HDU<br />
24.39.3.6 void <strong>CCfits</strong>::PHDU::scale ( double value ) [virtual]<br />
set the BSCALE keyword value for images (see warning for images of int type)<br />
For primary HDUs and image extensions, this will add (or update) the BSCALE keyword<br />
in the header. The new setting will affect future image array read/writes as described<br />
in section 4.7 Data Scaling of the CFITSIO manual. For table extensions this<br />
function does nothing.<br />
WARNING: If the image contains integer-type data (as indicated by the bitpix() return<br />
value), the new scale and zero value combination must not be such that the scaled<br />
data would require a floating-point type (this uses the CFITSIO function fits_get_img-<br />
_equivtype to make the determination). If this situation occurs, the function will throw<br />
a FitsException.<br />
Reimplemented from <strong>CCfits</strong>::HDU.<br />
24.39.3.7 template void <strong>CCfits</strong>::PHDU::write ( const std::vector< long > &<br />
first, long nElements, const std::valarray< S > & data, S ∗ nullValue )<br />
Write a set of pixels to an image extension with the first pixel specified by an n-tuple,<br />
processing undefined data.<br />
All the overloaded versions of PHDU::write perform operations on ∗this if it is an<br />
image and throw a WrongExtensionType exception if not. Where appropriate, alternate<br />
versions allow undefined data to be processed<br />
Parameters<br />
first an n-tuple of dimension equal to the image dimension specifying the<br />
first pixel in the range to be written<br />
nElements number of pixels to be written<br />
data array of data to be written<br />
nullValue pointer to null value (data with this value written as undefined; needs<br />
the BLANK keyword to have been specified).<br />
24.39.3.8 template void <strong>CCfits</strong>::PHDU::write ( long first, long nElements, const<br />
std::valarray< S > & data, S ∗ nullValue )<br />
write array to image starting with a specified pixel and allowing undefined data to be<br />
processed<br />
parameters after the first are as for version with n-tuple specifying first element. these<br />
two version are equivalent, except that it is possible for the first pixel number to exceed<br />
Generated on Tue Dec 6 2011 16:12:51 for <strong>CCfits</strong> by Doxygen
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