user function and plot

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!

[Rik]

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.

Answer 1

[VBBV]

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