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### NAME

ft_headsetl,ft_headseti,ft_headsetr,ft_headsets -Fitsy FITS header set routines.

### SYNOPSIS

    FITSCard ft_headsetl(FITSHead fits, char *name, int n, int lvalue, char *comm);
    FITSCard ft_headseti(FITSHead fits, char *name, int n, int ivalue, char *comm);
    FITSCard ft_headsetr(FITSHead fits, char *name, int n, double rvalue, int prec, char *comm);
    FITSCard ft_headsets(FITSHead fits, char *name, int n, char *svalue, char *comm);

### PARAMETERS

- FITSHead fits - FITS header to search in.
- char *name - keyword name.
- int n - keyword index number, if is zero no index number is appended to the keyword.
- int lvalue - Logical to format as a FITS value.
- char *comm - Comment for the card.
- int ivalue - Integer to format as a FITS value.
- double rvalue - Double to format as a FITS value.
- int prec - The value is formatted at this precision.
- char *svalue - String to format as a FITS value.

### DESCRIPTION

#### ft_headsetl

Find a FITS card in the header and format a logical value into it.

#### ft_headseti

Find a FITS card in the header and format a logical value into it.

#### ft_headsetr

Find a FITS card in the header and format a logical value into it.

#### ft_headsets

Find a FITS card in the header and format a logical value into it.

### EXAMPLES

Set the value part of a card in a header:

                    int     i = 15;
                    double  d = 34.7;
                    char   *c = "Shutter";

                    FITSCard        fits;
                    FITSCard        card;

            card = ft_headsetl(fits, "Cosmic", 0, 1, "Removed Cosimics (silver bullet method)");
            card = ft_headseti(fits, "IValue" , 0, i, "15 is the number");

            card = ft_headsetr(fits, "Gain", 1, d, 2, "GAIN1");
            card = ft_headsetr(fits, "Gain", 2, d, 2, "GAIN2");

            card = ft_headsets(fits, "XHIST", 1, "Xray processed!", NULL);

            /* In this example the special pointer ft_comment is used to
               use the existing comment in the card.
             */
            card = ft_headsets(fits, "FILTER", 0, "V", ft_comment);

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