sss / Владимиров-Демерт_1_2
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For example, PLOT(X,Y,'c+:') plots a cyan dotted line with a plus
at each data point; PLOT(X,Y,'bd') plots blue diamond at each data
point but does not draw any line.
PLOT(X1,Y1,S1,X2,Y2,S2,X3,Y3,S3,...) combines the plots defined by
the (X,Y,S) triples, where the X's and Y's are vectors or matrices
and the S's are strings.
For example, PLOT(X,Y,'y-',X,Y,'go') plots the data twice, with a
solid yellow line interpolating green circles at the data points.
The PLOT command, if no color is specified, makes automatic use of
the colors specified by the axes ColorOrder property. The default
ColorOrder is listed in the table above for color systems where the
default is blue for one line, and for multiple lines, to cycle
through the first six colors in the table. For monochrome systems,
PLOT cycles over the axes LineStyleOrder property.
If you do not specify a marker type, PLOT uses no marker.
If you do not specify a line style, PLOT uses a solid line.
PLOT(AX,...) plots into the axes with handle AX.
PLOT returns a column vector of handles to lineseries objects, one
handle per plotted line.
The X,Y pairs, or X,Y,S triples, can be followed by
parameter/value pairs to specify additional properties
of the lines. For example, PLOT(X,Y,'LineWidth',2,'Color',[.6 0 0])
will create a plot with a dark red line width of 2 points.
Example
x = -pi:pi/10:pi;
y = tan(sin(x)) - sin(tan(x));
plot(x,y,'--rs','LineWidth',2,...
'MarkerEdgeColor','k',...
'MarkerFaceColor','g',...
'MarkerSize',10)
See also plottools, semilogx, semilogy, loglog, plotyy, plot3, grid,
title, xlabel, ylabel, axis, axes, hold, legend, subplot, scatter.
Overloaded methods:
timeseries/plot
channel.plot
dspdata.plot
wdectree/plot
ntree/plot
dtree/plot
wvtree/plot
rwvtree/plot
edwttree/plot
Reference page in Help browser
doc plot
>> help LineWidth
LineWidth not found.
Use the Help browser Search tab to search the documentation, or
type "help help" for help command options, such as help for methods.
>> x=-2*pi:pi/6:2*pi;
>> plot(x,y1,'r',x,y2,'g*',x,y3,'mp-.')
>> grid on, hold on, xlabel(x),ylabel(y);
>> x=-pi:pi/6:pi;
>> y1=sin(x);
>> y2=sin(x)-2;
>> y3=sin(x)+1;
>> plot(x,y1,'r',x,y2,'g*',x,y3,'mp-.')
>> grid on, hold on, xlabel(x),ylabel(y);
>> grid on, hold on, xlabel('x'),ylabel('y');
>> plot(x,y1,'r',x,y2,'g*',x,y3,'mp-.')
>> tittle('Графики функций y=sin(x), y=sin(x)-2, y=sin(x)+1')
??? Undefined function or method 'tittle' for input arguments of type 'char'.
>> title('Графики функций y=sin(x), y=sin(x)-2, y=sin(x)+1')
>> x=-2*pi:pi/20:2*pi;
y=cos(x);
plot(x,y)
hold on
plot(x,cos(2*x),'g')
plot(x,cos(0.5*x),'r')
grid on
xlabel('x'),ylabel('y')
title('Графики функций y=cos(x), y=cos(2x), y=cos(0,5x)')
>> x=-2*pi:pi/20:2*pi;
y=cos(x);
plot(x,y)
hold on
plot(x,cos(2*x),'g')
plot(x,cos(0.5*x),'r')
grid on
xlabel('x'),ylabel('y')
title('Графики функций y=cos(x), y=cos(2x), y=cos(0,5x)')
>> line ([-8 8],[0 0],'Color','black')
>> y1=cos(x);
>> y=2*cos(x);
>> y2=2*cos(x);
>> y3=0.3*cos(x);
>>
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>> a=[7 2 3; 5 -3 2; 10 -11 5]
a =
7 2 3
5 -3 2
10 -11 5
>> det(a)
ans =
-36.0000
>> x=-2*pi:pi/20:2*pi;
y=cos(x);
plot(x,y)
hold on
plot(x,cos(2*x),'g')
plot(x,cos(0.5*x),'r')
grid on
xlabel('x'),ylabel('y')
title('Графики функций y=cos(x), y=cos(2x), y=cos(0,5x)')
x=-2*pi:pi/20:2*pi;
y=cos(x);
plot(x,y)
hold on
plot(x,cos(2*x),'g')
plot(x,cos(0.5*x),'r')
grid on
xlabel('x'),ylabel('y')
title('Графики функций y=cos(x), y=cos(2x), y=cos(0,5x)')
line ([-8 8],[0 0],'Color','black')
>> x=-2*pi:pi/6:2*pi;
>> y1=cos(x);
y=2*cos(x);
y2=2*cos(x);
y3=0.3*cos(x);
>>
>> plot(x,y1,'r',x,y2,'g*',x,y3,'mp-.')
>> hold on, grid on
>> xlabel(x),ylabel(y);
>> xlabel('x'),ylabel('y');
>> o=[15 2 3; 15 -3 2; 36 -11 5]
o =
15 2 3
15 -3 2
36 -11 5
>> det(o)
ans =
-72.0000
>> x=-2:1/100:2
x =
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>> y=exp(x);
>> plot(x,y,'r')
>> plot(x,y,'r')
>> hold on, grid on
>> xlabel('x'),ylabel('y');
>> x=e^-2
??? Undefined function or variable 'e'.
>> x=exp^-2
??? Error using ==> exp
Not enough input arguments.
>> x=exp(-2)
x =
0.1353
>> x=exp(-2):1/100:exp(2);
>> y=log(x);
>> plot(x,y,'g*')
>> x=-2:1/100:exp(2);
>> y=x;
>> plot(x,y,'mp-.')
>> axis equal
>> subplot(row,col,cur)
??? Undefined function or variable 'row'.
>> x=-2*pi:pi/20:2*pi;
y1=sin(x); y2=cos(x);
subplot(2,1,1);plot(x,y1);
grid on; title('y=sin(x)')
xlabel('x'),ylabel('y')
axis([-2*pi 2*pi -1 1]) %Обратите внимание, как изменилось окно графика (пояснение ниже)
line([-2*pi 2*pi],[0 0],'Color','black')
line([0 0],[-1 1],'Color','black')
subplot(2,1,2); plot(x,y2);
grid on; title('y=cos(x)')
xlabel('x'),ylabel('y')
axis([-2*pi 2*pi -1 1])
line([-2*pi 2*pi],[0 0],'Color','black')
line([0 0],[-1 1],'Color','black')
>> x=-5:1/10:5;
>> f=abs(abs(x)-2);
>> hold off
>> subplot(2,3,1);plot(x,f);
>> x=x-2;
>> x=-5:1/10:5;
>> x1=x-2;
>> f=abs(abs(x1)-2);
>> subplot(2,3,2);plot(x1,f);
>> x2=x+2;
>> f=abs(abs(x2)-2);
>> subplot(2,3,3);plot(x2,f);
>> x3=x*2;
>> f=abs(abs(x3)-2);
>> subplot(2,3,4);plot(x3,f);
>> x4=x*0.5;
>> f=abs(abs(x4)-2);
>> subplot(2,3,5);plot(x4,f);
>> x5=-x;
>> f=abs(abs(x5)-2);
>> subplot(2,3,6);plot(x5,f);
>> f=abs(abs(x)-2);
>> f1=-аж
??? f1=-аж
|
Error: The input character is not valid in MATLAB statements or expressions.
>> f1=-f;
>> subplot(2,3,1);plot(x,f1);
>> f2=f*2;
>> subplot(2,3,2);plot(x,f2);
>> f3=0.5*f;
>> subplot(2,3,3);plot(x,f3);
>> f4=f-2;
>> f4=f+2;
>> subplot(2,3,4);plot(x,f4);
>> f5=f-2;
>> subplot(2,3,6);plot(x,f5);
>> subplot(2,3,5);plot(x,f4);
>> subplot(2,3,4);plot(x,f3);
>> subplot(2,3,3);plot(x,f2);
>> subplot(2,3,2);plot(x,f1);
>> subplot(2,3,1);plot(x,f);
>> help fplot
FPLOT Plot function
FPLOT(FUN,LIMS) plots the function FUN between the x-axis limits
specified by LIMS = [XMIN XMAX]. Using LIMS = [XMIN XMAX YMIN YMAX]
also controls the y-axis limits. FUN(x) must return a row vector for
each element of vector x. For example, if FUN returns
[f1(x),f2(x),f3(x)] then for input [x1;x2] FUN should return
[f1(x1) f2(x1) f3(x1);
f1(x2) f2(x2) f3(x2)]
FPLOT(FUN,LIMS,TOL) with TOL < 1 specifies the relative error
tolerance. The default TOL is 2e-3, i.e. 0.2 percent accuracy.
FPLOT(FUN,LIMS,N) with N >= 1 plots the function with a minimum of N+1
points. The default N is 1. The maximum step size is restricted to be
(1/N)*(XMAX-XMIN).
FPLOT(FUN,LIMS,'LineSpec') plots with the given line specification.
FPLOT(FUN,LIMS,...) accepts combinations of the optional arguments
TOL, N, and 'LineSpec', in any order.
[X,Y] = FPLOT(FUN,LIMS,...) returns X and Y such that Y = FUN(X). No
plot is drawn on the screen.
FPLOT(AX,...) plots into AX instead of GCA.
Examples:
fplot(@humps,[0 1])
fplot(@(x)[tan(x),sin(x),cos(x)], 2*pi*[-1 1 -1 1])
fplot(@(x) sin(1./x), [0.01 0.1], 1e-3)
f = @(x,n)abs(exp(-1j*x*(0:n-1))*ones(n,1));
fplot(@(x)f(x,10),[0 2*pi])
See also plot, ezplot, function_handle.
Reference page in Help browser
doc fplot
EZPLOT Easy to use function plotter
EZPLOT(FUN) plots the function FUN(X) over the default domain
-2*PI < X < 2*PI, where FUN(X) is an explicitly defined function of X.
EZPLOT(FUN2) plots the implicitly defined function FUN2(X,Y) = 0 over
the default domain -2*PI < X < 2*PI and -2*PI < Y < 2*PI.
EZPLOT(FUN,[A,B]) plots FUN(X) over A < X < B.
EZPLOT(FUN2,[A,B]) plots FUN2(X,Y) = 0 over A < X < B and A < Y < B.
EZPLOT(FUN2,[XMIN,XMAX,YMIN,YMAX]) plots FUN2(X,Y) = 0 over
XMIN < X < XMAX and YMIN < Y < YMAX.
EZPLOT(FUNX,FUNY) plots the parametrically defined planar curve FUNX(T)
and FUNY(T) over the default domain 0 < T < 2*PI.
EZPLOT(FUNX,FUNY,[TMIN,TMAX]) plots FUNX(T) and FUNY(T) over
TMIN < T < TMAX.
EZPLOT(FUN,[A,B],FIG), EZPLOT(FUN2,[XMIN,XMAX,YMIN,YMAX],FIG), or
EZPLOT(FUNX,FUNY,[TMIN,TMAX],FIG) plots the function over the
specified domain in the figure window FIG.
EZPLOT(AX,...) plots into AX instead of GCA or FIG.
H = EZPLOT(...) returns handles to the plotted objects in H.
Examples:
The easiest way to express a function is via a string:
ezplot('x^2 - 2*x + 1')
One programming technique is to vectorize the string expression using
the array operators .* (TIMES), ./ (RDIVIDE), .\ (LDIVIDE), .^ (POWER).
This makes the algorithm more efficient since it can perform multiple
function evaluations at once.
ezplot('x.*y + x.^2 - y.^2 - 1')
You may also use a function handle to an existing function. Function
handles are more powerful and efficient than string expressions.
ezplot(@humps)
ezplot(@cos,@sin)
EZPLOT plots the variables in string expressions alphabetically.
subplot(1,2,1), ezplot('1./z - log(z) + log(-1+z) + t - 1')
To avoid this ambiguity, specify the order with an anonymous function:
subplot(1,2,2), ezplot(@(z,t)1./z - log(z) + log(-1+z) + t - 1)
If your function has additional parameters, for example k in myfun:
%-----------------------%
function z = myfun(x,y,k)
z = x.^k - y.^k - 1;
%-----------------------%
then you may use an anonymous function to specify that parameter:
ezplot(@(x,y)myfun(x,y,2))
See also ezcontour, ezcontourf, ezmesh, ezmeshc, ezplot3, ezpolar,
ezsurf, ezsurfc, plot, vectorize, function_handle.
Overloaded methods:
sym/ezplot
Reference page in Help browser
doc ezplot
>> subplot(1,2,1
??? subplot(1,2,1
|
Error: Expression or statement is incorrect--possibly unbalanced (, {, or [.
>> subplot(1,2,1)
>> x=-2*pi:pi/6:2*pi;
>> y1=sinh(x);
>> y2=cosh(x);
>> fplot(x,y1, 0,1)
??? Error using ==> fcnchk at 108
FUN must be a function, a valid string expression, or an inline function object.
Error in ==> fplot at 61
fun = fcnchk(fun);
>> fplot(x y1, 0,1)
??? fplot(x y1, 0,1)
|
Error: Unexpected MATLAB expression.
>> fplot(x, y1, 0.1)
??? Error using ==> fcnchk at 108
FUN must be a function, a valid string expression, or an inline function object.
Error in ==> fplot at 61
fun = fcnchk(fun);
>> Fplot(sinh(x),5,0.1)
Warning: Could not find an exact (case-sensitive) match for 'Fplot'.
D:\MATLAB\toolbox\matlab\specgraph\fplot.m is a case-insensitive match and will be used instead.
You can improve the performance of your code by using exact
name matches and we therefore recommend that you update your
usage accordingly. Alternatively, you can disable this warning using
warning('off','MATLAB:dispatcher:InexactCaseMatch').
This warning will become an error in future releases.
??? Error using ==> fcnchk at 108
FUN must be a function, a valid string expression, or an inline function object.
Error in ==> fplot at 61
fun = fcnchk(fun);
>> Fplot(sinh(x))
??? Error using ==> fplot at 52
Not enough input arguments.
>> Fplot(sinh(x), cosh(x), 0.1)
??? Error using ==> fcnchk at 108
FUN must be a function, a valid string expression, or an inline function object.
Error in ==> fplot at 61
fun = fcnchk(fun);
>> Fplot(sinh(x), cosh(x))
??? Error using ==> fcnchk at 108
FUN must be a function, a valid string expression, or an inline function object.
Error in ==> fplot at 61
fun = fcnchk(fun);
>> Fplot(sinh(x); cosh(x))
??? Fplot(sinh(x); cosh(x))
|
Error: Unbalanced or unexpected parenthesis or bracket.
>> fplot(sinh(x), [-10 -10 10 10], 0.1)
??? Error using ==> fcnchk at 108
FUN must be a function, a valid string expression, or an inline function object.
Error in ==> fplot at 61
fun = fcnchk(fun);
>> fplot(sinh(x), [-10 10], 0.1)
??? Error using ==> fcnchk at 108
FUN must be a function, a valid string expression, or an inline function object.
Error in ==> fplot at 61
fun = fcnchk(fun);
>> fplot('sinh(x)', [-10 10], 0.1)
>> subplot(1,2,1); fplot('sinh(x)',[-10 10], 0.1)
>> subplot(1,2,2); fplot('cosh(x)', [-10 10, 0.1)
??? subplot(1,2,2); fplot('cosh(x)', [-10 10, 0.1)
|
Error: Unbalanced or unexpected parenthesis or bracket.
>> subplot(1,2,2); fplot('cosh(x)', [-10 10], 0.1)
>> hold on; grid on
>> subplot(1,2,1)
>> hold on; grid on
>> xlabel('x');ylabel('y'); title('y=sh x')
>> subplot(1,2,2);
>> xlabel('x');ylabel('y'); title('y=ch x')
>> x = 10.^(-3:1:3);
>> subplot(1,2,1)
>> y=x;
>> y1=1/x;
??? Error using ==> mldivide
Matrix dimensions must agree.
>> y1=1/x;
??? Error using ==> mldivide
Matrix dimensions must agree.
>> clear y1
>> y1=1/x;
??? Error using ==> mldivide
Matrix dimensions must agree.
>> x=[ 0.001, 0.01, 0.1, 1, 10, 100, 1000];
>> y=x;
>> y1=1/x;
??? Error using ==> mldivide
Matrix dimensions must agree.
>> y1=./x;
??? y1=./x;
|
Error: Unexpected MATLAB operator.
>> y1=1./x;
>> y2=1./sqrt(x);
>> plot(x,y,'-r*',x,y1,'b-->',x,y2,'go')
>> axis equal
>> subplot(1,2,2)
>> loglog(x,y,'-r*',x,y1,'b-->',x,y2,'go')
>> x=0:pi/6:pi;
>> y1=cos(x);
>> y2=1/y1;
??? Error using ==> mldivide
Matrix dimensions must agree.
>> y2=1./y1;
>> plot(x,y1,'g:',x,y2,'r-.')
>> hold on, grid on
>> line([0 0];[4 18])
??? line([0 0];[4 18])
|
Error: Unbalanced or unexpected parenthesis or bracket.
>> line([0 0],[4 18])
>> line([0 0],[4 18],'color','black')
>> line([0 0],[4 18],'color','black')
>> line([0 0],[4 18],'color','black')
>> line([0 0],[4 18],'color','black')
>> line([0 0],[4 18],'color','black')
>> xlabel('x'),ylabel('y')
>> line([0 0],[0 18],'color','black')
>> line([2 2],[3 2],'color','black')
>> grid off
>> line([2 2],[3 2],'color','black')
>> line([0.5 2],[2 6],'color','black')
>> line([0.5 0.5],[0 14000000000000000],'color','black')
>> line([0.5 0.5],[-2000000000000000 14000000000000000],'color','black')
>> line([0.5 0.5],[-2000000000000000 18000000000000000],'color','black')
>> x=0:pi/6:pi;
>> y1=cos(x);
>> y2=1/.y1;
??? y2=1/.y1;
|
Error: Unexpected MATLAB operator.
>> y2=1./y1;
>> plot(x,y1,'r:',x, y2, 'g-.')
>> plot(x,y1)
>> fplot('cos(x)', [-10 10], 'r:')
>> hold on
>> fplot('1/cos(x)', [-10 10], 'r-.')
>> fplot('cos(x)', [-10 10], 'g:')
>> fplot('cos(x)', [-10 10 -1.5 1.5], 'g:')
>> fplot('1/cos(x)', [-10 10 -1.5 1.5], 'r-.')
>> hold on
>> fplot('cos(x)', [-10 10 -1.5 1.5], 'g:')
>> line([-10 10], [0 0], 'color', 'black')
>> line([0 0], [-1.5 1.5], 'color', 'black')
>> xlabel('x'), ylabel('y'); title('cos(x) and 1/cos(x)')
>> line([0 0],[-1.5 1.5], 'color', 'blue')
>>
>> x=-pi/2:pi/6:pi/2;
>> fplot('sin(x)', [-10 10 -1.5 1.5], 'b-')
>> hold on
>> fplot('1/sin(x)', [-10 10 -1.5 1.5], 'r:')
>> grid on
>> line([-10 10],[0 0], 'color', 'black')
>> line([0 0],[-1.5 1.5], 'color', 'black')
>> xlabel('x'), ylabel('y'); title('sin(x) and 1/sin(x)')
>> line([1.6 1.6],[-1.5 1.5], 'm-')
??? Error using ==> line
String argument is an unknown option.
>> line([1.6 1.6],[-1.5 1.5], 'color', 'purple')
??? Error using ==> line
Bad property value found.
Object Name : line
Property Name : 'Color'.
>> color help
ans =
1
2
3
4
>> line([1.6 1.6],[-1.5 1.5], 'color', '1')
??? Error using ==> line
Bad property value found.
Object Name : line
Property Name : 'Color'.
>> line([1.6 1.6],[-1.5 1.5], 'Color', 1)
??? Error using ==> line
Color value must be a 3 element numeric vector
>> line([1.6 1.6],[-1.5 1.5], 'Color', 'black')
>> line help
??? Error using ==> line
Not enough input arguments.
>> help line
LINE Create line.
LINE(X,Y) adds the line in vectors X and Y to the current axes.
If X and Y are matrices the same size, one line per column is added.
LINE(X,Y,Z) creates lines in 3-D coordinates.
LINE returns a column vector of handles to LINE objects,
one handle per line. LINEs are children of AXES objects.
The X,Y pair (X,Y,Z triple for 3-D) can be followed by
parameter/value pairs to specify additional properties of the lines.
The X,Y pair (X,Y,Z triple for 3-D) can be omitted entirely, and
all properties specified using parameter/value pairs.
Execute GET(H), where H is a line handle, to see a list of line
object properties and their current values. Execute SET(H) to see a
list of line object properties and legal property values.
See also patch, text, plot, plot3.
Reference page in Help browser
doc line
>> help color
COLOR Column partition for sparse finite differences.
GROUP = COLOR(J,P) returns a partition of the
column corresponding to a coloring of the column-
intersection graph. GROUP(I) = J means column I is
colored J.
All columns belonging to a color can be estimated
in a single finite difference.
Reference page in Help browser
doc color
>> line([1.6 1.6],[-1.5 1.5], 'Color', 'magenta')