Stata 15 help for schemes

[G-4] schemes intro -- Introduction to schemes

Syntax

set scheme schemename [, permanently]

graph ... [, ... scheme(schemename) ...]

schemename Foreground Background Description ----------------------------------------------------------------------- s2color color white factory setting s2mono monochrome white s2color in monochrome s2gcolor color white used in the Stata manuals s2manual monochrome white s2gcolor in monochrome s2gmanual monochrome white previously used in the [G] manual

s1rcolor color black a plain look on black background s1color color white a plain look s1mono monochrome white a plain look in monochrome s1manual monochrome white s1mono but smaller

economist color white The Economist magazine sj monochrome white Stata Journal -----------------------------------------------------------------------

Other schemenames may be available; type

. graph query, schemes

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

Description

A scheme specifies the overall look of the graph.

set scheme sets the default scheme; see [G-2] set scheme for more information about this command.

Option scheme() specifies the graphics scheme to be used with this particular graph command without changing the default.

Remarks

Remarks are presented under the following headings:

The role of schemes Finding out about other schemes Setting your default scheme The scheme is applied at display time Background color Foreground color Obtaining new schemes Examples of schemes

See scheme files for a discussion of how to create your own schemes.

The role of schemes

When you type, for instance,

. scatter yvar xvar

results are the same as if you typed

. scatter yvar xvar, scheme(your_default_scheme)

If you have not used the set scheme command to change your default scheme, your_default_scheme is s2color.

The scheme specifies the overall look for the graph, and by that we mean just about everything you can imagine. It determines such things as whether y axes are on the left or the right, how many values are by default labeled on the axes, and the colors that are used. In fact, almost every statement made in other parts of this manual stating how something appears, or the relationship between how things appear, must not be taken too literally. How things appear is in fact controlled by the scheme:

o In [G-4] symbolstyle, we state that markers -- the ink that denotes the position of points on a plot -- have a default size of msize(medium) and that small symbols have a size of msize(small). That is generally true, but the size of the markers is in fact set by the scheme, and a scheme might specify different default sizes.

o In [G-3] axis_choice_options, we state that when there is one y axis, which appears on the left, and when there are two, the second appears on the right. What is in fact true is that where axes appear is controlled by the scheme and that most schemes work the way described. Another scheme named economist, however, displays things differently.

o In [G-3] title_options, we state where the titles, subtitles, etc., appear, and we provide a diagram so that there can be no confusion. But where the titles, subtitles, etc., appear is in fact controlled by the scheme, and what we have described is what is true for the scheme named s2color.

The list goes on and on. If it has to do with the look of the result, it is controlled by the scheme.

To understand just how much difference the scheme can make, you should type

. scatter yvar xvar, scheme(economist)

scheme(economist) specifies a look similar to that used by The Economist magazine (http://www.economist.com) , whose graphs we believe to be worthy of emulation. By comparison with the c2color scheme, the economist scheme moves y axes to the right, makes titles left justified, defaults grid lines to be on, sets a background color, and moves the note to the top right and expects it to be a number.

Finding out about other schemes

A list of schemes is provided in the syntax diagram above, but do not rely on the list being up to date. Instead, type

. graph query, schemes

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

Try drawing a few graphs with each:

. graph ... , ... scheme(schemename)

Setting your default scheme

If you want to set your default scheme to, say, economist, type

. set scheme economist

The economist scheme will now be your default scheme for the rest of this session, but the next time you use Stata, you will be back to using your old default scheme. If you type

. set scheme economist, permanently

economist will become your default scheme both for the rest of this session and in future sessions.

If you want to change your scheme back to s2color -- the default scheme in Stata as originally shipped -- type

. set scheme default, permanently

See [G-2] set scheme.

The scheme is applied at display time

Say that you type

. graph mpg weight, saving(mygraph)

to create and save the file mygraph.gph (see [G-3] saving_option). If later you redisplay the graph by typing

. graph use mygraph

the graph will reappear as you originally drew it. It will be displayed using the same scheme with which it was originally drawn, regardless of your current set scheme setting. If you type

. graph use mygraph, scheme(economist)

the graph will be displayed using the economist scheme. It will be the same graph but will look different. You can change the scheme with which a graph is drawn beforehand, on the original graph command, or later.

Background color

In the table at the beginning of the entry, we characterize the background color as being white or black, although actually what we mean is light or dark because some of the schemes set background tinting. We mean that "white" background schemes are suitable for printing. Printers (both the mechanical ones and the human ones) prefer that you avoid dark backgrounds because of the large amounts of ink required and the corresponding problems with bleed-through. On the other hand, dark backgrounds look good on monitors.

In any case, you may change the background color of a scheme by using the region_options graphregion(fcolor()), graphregion(ifcolor()), plotregion(fcolor()), and plotregion(ifcolor()); see [G-3] region_options. When overriding the background color, choose light colors for schemes that naturally have white backgrounds and dark colors for regions that naturally have black backgrounds.

Schemes that naturally have a black background are by default printed in monochrome. See [G-2] set printcolor if you wish to override this.

If you are producing graphs for printing on white paper, we suggest that you choose a scheme with a naturally white background.

Foreground color

In the table at the beginning of this entry, we categorized the foreground as being color or monochrome. This refers to whether lines, markers, fills, etc., are presented by default in color or monochrome. Regardless of the scheme you choose, you can specify options such as mcolor() and lcolor(), to control the color for each item on the graph.

Just because we categorized the foreground as monochrome, this does not mean that you cannot specify colors in the options.

Obtaining new schemes

Your copy of Stata may already have schemes other than those documented in this help file. To find out, type

. graph query, schemes

Also, new schemes are added and existing schemes updated along with all the rest of Stata, so if you are connected to the Internet, type

. update query

and follow any instructions given; see [R] update.

Finally, other users may have created schemes that could be of interest to you. To search the Internet, type

. search scheme (will display results in Viewer; use Back button to return to this help file)

From there, you will be able to click to install any schemes that interest you; see [R] search.

Once a scheme is installed, which can be determined by verifying that it appears in the list shown by

. graph query, schemes

you can use it with the scheme() option

. graph ..., ... scheme(newscheme)

or you can set it as your default, temporarily

. set scheme newscheme

or permanently

. set scheme newscheme, permanently

Examples of schemes

See Examples of schemes in Remarks and examples of [G-4] schemes intro for graphs with the various schemes.


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