Plot in python but it changed my y values automaticlly in the plot

Question

When I wanna plot my data in python, it shows modified values of my y-values instead of original data.

As can be seen in the plot, it subtracts 1.455e2(which is written beside the y axis) from my original data and I wanna show the original data in my plot. Here's my script about the plot:

plt.xlabel("H(Oe)")
plt.ylabel("R*E-3(dBm)")

plt.plot(h_1,r_2,linestyle="-",linewidth=1,label="2.50_GHz")
plt.legend(loc='upper left')
plt.grid(color="k", linestyle=":")
plt.savefig("0_deg_2.50_GHz_R.png", dpi=300,bbox_inches = 'tight')
plt.show()

And actually it does show the original y-values for some other data files, I'm using the exactly same script but for this one it always shows the modified values. Does anyone know how to fix it? Thanks a lot.

you don't have a plt.plot(h_1, your_modified_values...) above this code, do you? or the modified values in r_2? — E. Bassett
– E. Bassett, Commented Mar 17, 2020 at 20:58

jwalton · Accepted Answer · 2020-03-17 21:01:03Z

3

This is not scientific notation but is known as an offset (hence the + before the number). The original values can be seen by adding the offset to all of the values.

You can prevent an offset being used as:

plt.ticklabel_format(useOffset=False)

edited Mar 17, 2020 at 21:01

answered Mar 17, 2020 at 20:59

jwalton

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2 Comments

Gabriel Over a year ago

Yep, this is correct. I thought I saw scientific notation but it is not the case.

jwalton Over a year ago

It's the e: always makes me immediately think of scientific notation too!

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