Plot Date from Excel Table

Hi Everyone, my first post here. This should be a easy but it's driving me crazy!. I have tried finding the answer in the documentation and on the forums but I cannot, apologies, I know this will be obvious once I know.

I have an Excel file with data formatted as such:

                a                    b
1     2019-05-23        $100.30
2     2019-05-24        $100.40
3    2019-05-25         $100.50
4    2019-05-26         $100.60

I imported the file and it shows in workspace as DatePrice. I have tried two methods to plot this and failed:

1) >> plot (DatePrice(1:4,1),DatePrice(1:4,2))
Error using tabular/plot
Too many input arguments.
 2) 
>> date = DatePrice(1:4,1)              --------- this returns the dates properly
>> price = DatePrice(1:4,2)              ----------- this returns the prices properly
>> plot (date,price)        -------------I get this error
Error using tabular/plot
Too many input arguments.

PS: I have searched the forums and I know I have to do something like datenum(xxxxxxxxx) but I'm not sure what. I tried to no avail:

>> dateToNumber = datenum(DatePrice(1:4,),'yyyy-mm-dd')

Can anyone kindly help?

[dpb]

Show the code used to import the data and what does

whos DatePrice date price

show after you do the above?

OH--Also, maybe you've inadvertentedly aliased the plot() function. Show us also what

which -all plot

returns.

It can't hurt anything, so instead of waiting for us,

clear plot

and then try again and see if symptoms go away. If so, that's what happened; you accidentally overwrote the plot name.