MATLABLecture 8 SchoolofMathematicalSciencesXiamenUniversity http://gdjpkc.xmu.edu.cn
Lec81
MATLABLecture8GraphicsCurve
绘图
Ref : MATLAB→Graphics→Basic Plotting Commands
l Vocabulary:
plot 绘图 xaxisx 轴
display 显示 annotate 注释
curve/curvedline 曲线 explicit显式
implicit 隐式 parameter参数
polarcoordinates 极坐标 boldface 黑体
grid 网格 title 标题
figure 图形 legend 图例
radian 弧度 radius 半径
l Somefunctions
plot ezplot polar plot3 title xlabel ylabel *figure *legend *subplot
*gridon *gridoff
l Graphics
MATLABprovidesavarietyoffunctionsfordisplayingvectordataaslineplots,aswellas
functionsforannotatingandprintingthesegraphs.
² Therepresentationofcurveandsurface
ü Therepresentationofcurveonplane
Explicitscheme:y=f(x)
Implicitformula:F(x,y)=0
Parameterrepresentation:
( )
( )
x x t
y y t
=
ì
í
=
î
Polarcoordinatesrepresentation: ( )f
r q
=
Tabulation,saytableof trigonometric function,experimentaldataetc.
Figure,saysinecurve,experimentalcurveetc.
ü Therepresentationofcurveinspace
Explicitscheme:z=f(x,y)
Implicitformula:F(x,y,z)=0
Parameterrepresentation:
( , )
( , )
( , )
x x u v
y y u v
z z u v
=
ì
ï
=
í
ï
=
î
Dataform, { }, { }, { }, 1, 2,..., , 1, 2,...,
i j ij
x x y y z z i m j n = = = = = .
Graphics
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