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# plot2d_old_version

**以下に記述される構文は廃止対象です**

### C呼び出し手順

plot2d([logflag],x,y,[style,strf,leg,rect,nax])

### パラメータ

- x,y
行列 (または列ベクトル).

通常,

`x`

は`y`

と同じ大きさの行列です (the column j of`y`

のj列目が`x`

のj列目に対してプロットされます)`x`

の全ての列が等しい場合 (すなわち全ての曲線の横軸が等しい場合),`x`

はこれらの横軸の(列)ベクトルとなります. (`x`

は`y`

の行の次元に 等しい長さの列ベクトルです.)`x`

が指定されない場合, 列ベクトル[1; 2; ...; yの行の次元]が仮定されます.

- style
is a real row vector of size nc. The style to use for curve

`i`

is defined by`style(i)`

. The default style is`1:nc`

(1 for the first curve, 2 for the second, etc.).if

`style(i)`

is negative or zero, the curve is plotted using the mark with id`abs(style(i))`

; use`xset()`

to set the mark id and xget('mark') to get the current mark id.if

`style(i)`

is strictly positive, a plain line with color id`style(i)`

or a dashed line with dash id`style(i)`

is used; use`xset()`

to see the color ids.

- strf
is a string of length 3

`"xyz"`

(by default`strf= "081"`

)- x
controls the display of captions.

- x=0
no caption.

- x=1
captions are displayed. They are given by the optional argument

`leg`

.

- y
controls the computation of the actual coordinate ranges from the minimal requested values. Actual ranges can be larger than minimal requirements.

- y=0
no computation, the plot use the previus (or default) scale

- y=1
from the rect arg

- y=2
from the min/max of the x, y datas

- y=3
built for an isometric scale from the rect arg

- y=4
built for an isometric plot from the min/max of the x, y datas

- y=5
enlarged for pretty axes from the rect arg

- y=6
enlarged for pretty axes from the min/max of the x, y datas

- y=7
like y=1 but the previus plot(s) are redrawn to use the new scale

- y=8
like y=2 but the previus plot(s) are redrawn to use the new scale

- z
controls the display of information on the frame around the plot. If axes are requested, the number of tics can be specified by the

`nax`

optional argument.- z=0
nothing is drawn around the plot.

- z=1
axes are drawn, the y=axis is displayed on the left.

- z=2
the plot is surrounded by a box without tics.

- z=3
axes are drawn, the y=axis is displayed on the right.

- z=4
axes are drawn centred in the middle of the frame box.

- z=5
axes are drawn so as to cross at point

`(0,0)`

. If point`(0,0)`

does not lie inside the frame, axes will not appear on the graph.

- leg
a string. It is used when the first character x of argument

`strf`

is 1.`leg`

has the form`"leg1@leg2@...."`

where`leg1`

,`leg2`

, etc. are respectively the captions of the first curve, of the second curve, etc. The default is`""`

.- rect
This argument is used when the second character y of argument

`strf`

is 1, 3 or 5. It is a row vector of size 4 and gives the dimension of the frame:`rect=[xmin,ymin,xmax,ymax]`

.- nax
This argument is used when the third character z of argument

`strf`

is 1. It is a row vector with four entries`[nx,Nx,ny,Ny]`

where`nx`

(`ny`

) is the number of subgraduations on the x (y) axis and`Nx`

(`Ny`

) is the number of graduations on the x (y) axis.- logflag
a string formed by to characters h (for horizontal axis) and v (for vertical axis) each of these characters can take the values "n" or "l". "l" stands for logarithmic graduation and "n" for normal graduation. For example "ll"stands for a log-log plot. Default value is "nn".

### 説明

`plot2d`

plots a set of 2D curves. Piecewise linear
plotting is used.

By default, successive plots are superposed. To clear the previous
plot, use `clf()`

.

See the meaning of the parameters above for a complete description.

Enter the command `plot2d()`

to see a demo.

Other high level plot2d function exists:

### 例

//simple plot x=[0:0.1:2*%pi]'; plot2d(sin(x)) clf() plot2d(x,sin(x)) //multiple plot clf() plot2d(x,[sin(x) sin(2*x) sin(3*x)]) // multiple plot giving the dimensions of the frame // old syntax and new syntax clf() plot2d(x,[sin(x) sin(2*x) sin(3*x)],1:3,"011","",[0,0,6,0.5]) clf() plot2d(x,[sin(x) sin(2*x) sin(3*x)],rect=[0,0,6,0.5]) //multiple plot with captions and given tics // old syntax and new syntax clf() plot2d(x,[sin(x) sin(2*x) sin(3*x)],.. [1,2,3],"111","L1@L2@L3",[0,-2,2*%pi,2],[2,10,2,10]); clf() plot2d(x,[sin(x) sin(2*x) sin(3*x)],.. [1,2,3],leg="L1@L2@L3",nax=[2,10,2,10],rect=[0,-2,2*%pi,2]) // isoview clf() plot2d(x,sin(x),1,"041") // scale clf() plot2d(x,sin(x),1,"061") // auto scaling with previous plots clf() plot2d(x,sin(x),1) plot2d(x,2*sin(x),2) plot2d(2*x,cos(x),3) // axis on the right clf() plot2d(x,sin(x),1,"183","sin(x)") // centered axis clf() plot2d(x,sin(x),1,"184","sin(x)") // axis centered at (0,0) clf() plot2d(x-4,sin(x),1,"185","sin(x)")

### 作者

J.Ph.C.

## Comments

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