Stata 15 help for symbolstyle

[G-4] symbolstyle -- Choices for the shape of markers

Syntax

Synonym symbolstyle (if any) Description ------------------------------------------------------- circle O solid diamond D solid triangle T solid square S solid plus + X X arrowf A filled arrow head arrow a pipe | V V

smcircle o solid smdiamond d solid smsquare s solid smtriangle t solid smplus smx x smv v

circle_hollow Oh hollow diamond_hollow Dh hollow triangle_hollow Th hollow square_hollow Sh hollow

smcircle_hollow oh hollow smdiamond_hollow dh hollow smtriangle_hollow th hollow smsquare_hollow sh hollow

point p a small dot none i a symbol that is invisible -------------------------------------------------------

For a symbol palette displaying each of the above symbols, type

. palette symbolpalette [, scheme(schemename)]

Other symbolstyles may be available; type

. graph query symbolstyle

to obtain the complete list of symbolstyles installed on your computer.

Description

Markers are the ink used to mark where points are on a plot; see [G-3] marker_options. symbolstyle specifies the shape of the marker.

You specify the symbolstyle inside the msymbol() option allowed with many of the graph commands:

. graph twoway ..., msymbol(symbolstyle) ...

Sometimes you will see that a symbolstylelist is allowed:

. scatter ..., msymbol(symbolstylelist) ...

A symbolstylelist is a sequence of symbolstyles separated by spaces. Shorthands are allowed to make specifying the list easier; see [G-4] stylelists.

Remarks

Remarks are presented under the following headings:

Typical use Filled and hollow symbols Size of symbols

Typical use

msymbol(symbolstyle) is one of the more commonly specified options. For instance, you may not be satisfied with the default rendition of

. scatter mpg weight if foreign || scatter mpg weight if !foreign

and prefer

. scatter mpg weight if foreign, msymbol(oh) || scatter mpg weight if !foreign, msymbol(x)

When you are graphing multiple y variables in the same plot, you can specify a list of symbolstyles inside the msymbol() option:

. scatter mpg1 mpg2 weight, msymbol(oh x)

The result is the same as typing

. scatter mpg1 weight, msymbol(oh) || scatter mpg2 weight, msymbol(x)

Also, in the above, we specified the symbol-style synonyms. Whether you type

. scatter mpg1 weight, msymbol(oh) || scatter mpg2 weight, msymbol(x)

or

. scatter mpg1 weight, msymbol(smcircle_hollow) || scatter mpg2 weight, msymbol(smx)

makes no difference.

Filled and hollow symbols

The symbolstyle specifies the shape of the symbol, and in that sense, one of the styles circle and hcircle -- and diamond and hdiamond, etc. -- is unnecessary in that each is a different rendition of the same shape. The option mfcolor(colorstyle) (see [G-3] marker_options) specifies how the inside of the symbol is to be filled. hcircle(), hdiamond, etc., are included for convenience and are equivalent to specifying

msymbol(Oh): msymbol(O) mfcolor(none)

msymbol(dh): msymbol(d) mfcolor(none)

etc.

Using mfcolor() to fill the inside of a symbol with different colors sometimes creates what are effectively new symbols. For instance, if you take msymbol(O) and fill its interior with a lighter shade of the same color used to outline the shape, you obtain a pleasing result. For instance, you might try

msymbol(O) mlcolor(yellow) mfcolor(.5*yellow)

or

msymbol(O) mlcolor(gs5) mfcolor(gs12)

as in

. scatter mpg weight, msymbol(O) mlcolor(gs5) mfcolor(gs14) (click to run)

Size of symbols

Just as msymbol(O) and msymbol(Oh) differ only in mfcolor(), msymbol(O) and msymbol(o) -- symbols circle and smcircle -- differ only in msize(). In particular,

msymbol(O): msymbol(O) msize(medium)

msymbol(o): msymbol(O) msize(small)

and the same is true for all the other large and small symbol pairs.

msize() is interpreted as being relative to the size of the graph region (see [G-3] region_options), so the same symbol size will in fact be a little different in

. scatter mpg weight

and

. scatter mpg weight, by(foreign total)


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