how to plot normalized column vs another colomn

hello matlab community, i have column such as i=1.0e+03 *[

   -0.0186
   -0.0386
   -0.0828
   -0.2184
   -0.6429
   -1.7906
   -2.4046
   -2.3125
   -2.0287
   -1.6919
   -1.4576
   -1.2357
   -1.0298
   -0.8806
   -0.7282
   -0.6215
   -0.5139
   -0.4438
   -0.3678
   -0.2828
   -0.1909
   -0.0873
    0.0044
    0.1253
    0.2889
    0.4730
    0.6821
    0.9877
    1.3166
    1.7460
    2.3511
    3.0306
    4.0117
    5.1284]
i want to plot i./imax vs another column like in the following picture, i don't know if i need to pick every element of the i column or just fex elements.
thank you.

Answer 1

[Joseph Cheng]

must be missing something as you have it right there

plot("your other column",i./max(i),'.')

then you'd fit a line and error bars? not sure how or what data you'll be using to calc the error bars and the smooth curve

[best16 programmer]

that's not what i'am looking for, i want to plot the current vs voltage and the result should be a sigmoid function,that sigmoid function what i'm looking for.did you saw the capture that I joined?