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set coslat

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set coslat

set coslat on|off

Sets scaling of the Latitude dimension to be the cosine of latitude, producing a "crunched" effect near the poles. Will only work for 1-D plots in which Latitude (Y) is the varying dimension. Sticks until reset.

درباره C ,

()cos

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cos

cos(expr)

Takes the cosine of the expr. Values are assumed to be in radians. Works on both gridded and station data.

درباره C ,

()tcorr​​

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()tcorr

(tcorr (expr1, expr2, tdim1, tdim2

This function produces a spatial map of temporal correlation coefficients.


    expr1   - a valid grads expression that varies in time
    expr2   - a valid grads expression that varies in time and may also vary in X and Y
    tdim1   - starting time dimension expression 
    tdim2   - ending time dimension expression 
درباره C ,

()scorr

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()scorr

This function calculates the spatial correlation between two variables over an X-Y domain. It returns a single number. The syntax is:

    (scorr(expr1, expr2, xdim1, xdim2, ydim1, ydim2
درباره C ,

control file

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Components of a grads Data Descriptor File

DSET
CHSUB
DTYPE
INDEX
STNMAP
TITLE
UNDEF
UNPACK 
FILEHEADER
XYHEADER
THEADER
HEADERBYTES
TRAILERBYTES
XVAR
YVAR
ZVAR
STID
TVAR 
TOFFVAR
CACHESIZE
OPTIONS
PDEF 
XDEF
YDEF
ZDEF
TDEF
EDEF
VECTORPAIRS
VARS
ENDVARS
ATTRIBUTE METADATA 
COMMENTS 

درباره C ,

q contours

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query

The query command allows the user to get information about a variety of aspects of the current grads session. Configuration, plot characteristics, graphics specifics, and file structure are some examples. The use of query pos combined with the coordinate transformations is the basis of many interactive applications with buttons and drop menus. The query command may be shortened to simply q. The syntax is:

درباره C ,

()const

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()const

const (expr, value, <-u|-a>)

This is a powerful function that allows the user to change the missing values of a variable, set all the non-missing values of a variable to a constant, or set all possible values of a variable (both valid and missing) to a constant.


    expr   a valid grads expression 
    value  a constant, either an integer or floating point value 
    -u     all missing data are set to value; non-missing data are unchanged
    -a     all data are set to value, both missing and non-missing
درباره C ,

q config

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query

The query command allows the user to get information about a variety of aspects of the current grads session. Configuration, plot characteristics, graphics specifics, and file structure are some examples. The use of query pos combined with the coordinate transformations is the basis of many interactive applications with buttons and drop menus. The query command may be shortened to simply q. The syntax is:


    query <option>
    or
    <option>
درباره C ,

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