Why my time series autoplot is not showing correctly?

[AvikGGU]

I'm trying to use forecast autoplot for my time series plot. however my plot doesn't reflect correctly. Any suggestions?
code:
ocean_ts= ts(temp[,8],start=c(1850,1),end=c(2015,12),frequency=12)
autoplot(ocean_ts)

I want the plot to show year from 1850 however it is showing from year 1950. Values are present for year 1850 - 1950, still it is not reflecting in the plot.

[robjhyndman]

It looks like you have missing values for the first 100 years. Please share the data if you want further help.

[AvikGGU]

Hello Rob,

Thank you for replying, I was not able to attach the dataset, however please find the URL to the dataset.

Global Temperature-Forecasting

I'm trying to do a timeseries plot for the LandandOcean Average Temp. When I rechecked the data, values are not missing for the first 100 years(between 1850 - 1950)

[robjhyndman]

That doesn't help as we don't know what you've done to import the data into R. Please share the output of dput(ocean_ts) and head(temp, 12).

[AvikGGU]

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head(temp, 12)

[robjhyndman]

So your ocean_ts has initial missing values as I suggested.

You haven't provided the output of head(temp,12) (only a partial image of it), so it is not possible to see whether the initial values in the 8th column of temp were also missing. But it is clear that the dates for temp begin in 1750, not 1850 as you claimed.