Stop Rounding of Y Axis Values in Plot

I am plotting data that i need more than the default rounding to 4 decimal places. I have tried using the "format long" command. this does not work. if I display data (display(a)), it works fine (plenty of digits). but when I plot, it is always rounding the y axis to 4 values. Even if i format the y axis ytickformat('%.6f') , i still get it rounding to 4. Very frustrating. Any help is appreciated. thank you.

[Joe Tracy]

Yes, thank you. You are right. It was actually working as intended on my graph. I had a conflicting error. Thanks for the reply.

Answer 1

[Mathieu NOE]

seems to work fine :

figure,
plot(0.25*rand(10,1))
ytickformat('%.6f')