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Chapter 4The Graph ModuleA graph should start with begin graph and end with end graph. The data to be plotted are organised intodatasets. A dataset consists of a series of (X,Y) coordinates, and has a name based on the letter “d” anda number between 1 and 99, e.g. d1The name dn can be used to define a default for all datasets. Many graph commands described belowstart with dn. This would normally be replaced by a specific dataset number e.g.,d3 marker diamondFor each xaxis command there is a corresponding yaxis, y2axis and x2axis command for setting the top leftand right hand axes. These commands are not explicitly mentioned in the following descriptions.4.1 Graph Commands (a summary)centercolormap fct pixels-x pixels-y [color] [invert] [zmin z 1 ] [zmax z 2 ] [palette pal]data filename [d1 d2 d3 ...] [d1=c1,c3] [ignore n] [comment char]dn [deresolve m] [average] linedn err d5 errwidth width-exp errup nn% errdown d4dn herr d5 herrwidth width-exp herrleft nn% errright d4dn key ”Dataset title”dn line [impulses] [steps] [fsteps] [hist] [bar]dn lstyle line-style lwidth line-width color coldn marker marker-name [msize marker-size] [mdata dn]dn nomissdn smooth — smoothmdn svg smooth [m]dn xmin x-low xmax x-high ymin y-low ymax y-highdn file “all.dat,xc,yc” [marker mname] [line]fullsizehscale hkey pos tl nobox hei exp offset xexp yexplet ds = exp [from low] [to high] [step exp] [where exp]let ds = x-exp, y-exp [from low] [to high] [step exp] [where exp]let dn = [routine] dm [options]let ds = hist dm [from x1] [to x2] [bins n] [step n]let ds = . . . [nsteps n]let ds = . . . [range dn]mathnoboxscale h vscale autosize x ytitle ”title” [hei ch-hei] [color col] [font font] [dist cm]under call23