user function and plot

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Hakyoon Kim
Hakyoon Kim 2022-11-17
回答： VBBV 2022-11-17
function [x1,x2]=distance_plot(W)
prompt1=('input value of W(N) = ') %W값 입력받기
prompt2=('input value of d(m) = ') %d값 입력받기
W=input(prompt1);
d=input(prompt2);
k1=104; %단위:N/m
k2=1.5*10^4; %단위:N/m
W0=linspace(0,W,1000);
x=0;
if x<d
x1=W/k1;
else x>=d
x2=(W+2*k2*d)/(k1+2*k2);
end
if x<d
x=linspace(0,d,1000);
plot(x1,W0)
xlabel('x1')
ylabel('W')
grid
else x>=d
x=linspace(0,d,1000);
plot(x2,W0)
xlabel('x2')
ylabel('W')
grid
end
(Don't care about the comments)
hello
i made a code(used defined function).
i thought about drawing a graph with a specified range according to the value of 'W' and 'd'.
there is no error code but graph didn't appear in the figure window.
Is it wrong to put the input value 'W' and 'd' directly into the ( W0=linspace(0,W,1000); ) and ( x=linspace(0,d,1000); )?
any other wrong?
thanks!
  1 个评论
Rik
Rik 2022-11-17
You're already writing a function, so why not have W and d both as input arguments? You're currently overwriting your input argument W in that input statement.

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采纳的回答

VBBV
VBBV 2022-11-17
Ran in:
May be this change, with regards to returning output variables x1 and x2 since function is not returning both variables as written
[x1 x2] = distance_plot
x1 = 0.0962
x2 = 1×1000
0 0.0040 0.0080 0.0120 0.0160 0.0200 0.0240 0.0280 0.0320 0.0360 0.0400 0.0440 0.0480 0.0521 0.0561 0.0601 0.0641 0.0681 0.0721 0.0761 0.0801 0.0841 0.0881 0.0921 0.0961 0.1001 0.1041 0.1081 0.1121 0.1161
function [x1,x2]=distance_plot % empty or no argument since inputs for W and d are fed after function call
W = 10; %input value for W e.g
d = 4; % input value for d e.g
k1=104; %단위:N/m
k2=1.5*10^4; %단위:N/m
W0=linspace(0,W,1000);
x=0;
if x<d % common condition
x1=W/k1;
x2=linspace(0,d,1000);
plot(x2,W0)
xlabel('x1')
ylabel('W')
grid
else x>=d % common condition
x2=(W+2*k2*d)/(k1+2*k2);
x1=linspace(0,d,1000);
plot(x1,W0)
xlabel('x2')
ylabel('W')
grid
end
end

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