Changing exponential axis scale

I have a graph with x-axis scale e-6 but I want the scale to be e-9. When I use the code ax = gca and then ax.XAxis.Exponent = -9, the x-axis scale becomes e2147483647. How can I get the x-axis to become e-9? Please see code below.

c = 3e+08; % Speed of light in m/s
h = 6.63e-34; % Planck's constant in Js
k = 1.38e-23; % Boltzmann's constant in J/K
T = 5973.15; % Temperature in K
y = 0:10e-9:2000e-9; % Wavelength in m

R = ((2*pi*h*c^2)./y.^5).*(1./(exp((h*c)./(k*T*y))-1)); % Spectral Irridiance in W/m^2/m

plot(y,R)
xlabel({'Wavelength','(nm)'});
ylabel({'Spectral Irridiance','(W/m^2/nm)'});
title('Black Body Radiation Spectrum at 5700 Degrees Celcius');

Answer 1

[Star Strider]

I am not certain what the problem is.

The approach you took appears to work here (R2023b) —

c = 3e+08; % Speed of light in m/s
h = 6.63e-34; % Planck's constant in Js
k = 1.38e-23; % Boltzmann's constant in J/K
T = 5973.15; % Temperature in K
y = 0:10e-9:2000e-9; % Wavelength in m

R = ((2*pi*h*c^2)./y.^5).*(1./(exp((h*c)./(k*T*y))-1)); % Spectral Irridiance in W/m^2/m

plot(y,R)
xlabel({'Wavelength','(nm)'});
ylabel({'Spectral Irridiance','(W/m^2/nm)'});
title('Black Body Radiation Spectrum at 5700 Degrees Celcius');
ax = gca;
ax.XAxis.Exponent = -9;

.

[Craig]

Ok thanks. I am using MATLAB Online which is the latest version so I dont know either.

[Star Strider]

As always, my pleasure!

I just now ran it in MATLAB Online (R2023b). It worked correctly, giving the same results as depicted here.

[Dyuman Joshi]

MATLAB Online has the same version as MATLAB Answers i.e. R2023b. You should not have any problems there. (Type "ver" in the command window to check)

Also, @Craig, if the wavelength is in meters, and the unit of x-axis is nano-meter, the xtick values should be adjusted accordingly as well no.