How can i plot this function? y=0.75/(log10(x)*2).^2

Hi, ive been trying differents ways of plotting fuctions such as log, implicit... but i cant manage to plot in 2D the next function in matlab

y= 0.75/(log10(x)*2).^2

Answer 1

[RAGHUNATHRAJU DASHARATHA]

As per my understanding you want to plot the given function in 2D plot .

It is just that you forgot to add '.' before '/' to do element wise operation.I will explain it with the example below

x=2:10;
y= 0.75./(log10(x)*2).^2

y = 1×9

2.0691 0.8237 0.5173 0.3838 0.3097 0.2625 0.2299 0.2059 0.1875

plot(x,y)

[Lucas Lombao Pascual]

You're right, thank you

Answer 2

[Jon]

Something like this?

x = linspace(1,10); % or whatever interval you would like change accordingly
y = 0.75 ./(log10(x).^2).^2 % note .^ for element wise power on log10(x)

y = 1×100

1.0e+05 * Inf 3.6781 0.2707 0.0623 0.0228 0.0107 0.0059 0.0036 0.0024 0.0017 0.0012 0.0009 0.0007 0.0006 0.0005 0.0004 0.0003 0.0003 0.0002 0.0002 0.0002 0.0002 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001

figure
plot(x,y)

% Or maybe you want the final power of 2 apply to the numerator and the
% denominator?
y = (0.75 ./(log10(x).^2)).^2

y = 1×100

1.0e+05 * Inf 2.7586 0.2030 0.0467 0.0171 0.0080 0.0044 0.0027 0.0018 0.0012 0.0009 0.0007 0.0005 0.0004 0.0003 0.0003 0.0002 0.0002 0.0002 0.0002 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001

plot(x,y)

Answer 3

[Mike Croucher]

How about this?

x = linspace(0.01,0.99,100); % Avoid tricky inputs like 1
y = 0.75./(log10(x)*2).^2;
plot(x,y)

Answer 4

[Torsten]

What do you mean by "in 2D" ? It is a simple function to be plotted y vs. x:

x = 2:0.01:5;
y = 0.75./(log10(x)*2).^2;
plot(x,y)