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First and last tick text

i have a data like this:
x: [0, 1, 3, 6, 9]
y: [16000,19000,17000,18000,19000]
how can i set a text for first and last tick?
like: ‘first’, 1, 3, 6, ‘last’

Hi @itsmohammadbahrami, welcome to the forum! Yes, you can set custom tick text using the ticktext parameter of xaxis, see for example and

can i set only first and last x axis text?
like this: [‘first’,‘last’]
not this: [‘first’, 1, 3, 6, ‘last’]