How to debug unexpected symbol in R [closed] - r

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I know that is really simple. I'm trying to calculate:
-2ˆ2 -(2.6)ˆ2 * (1/2)
Error: unexpected input in "-2�"

When I replace the ˆ with ^ it works on my system.

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could not find function "%n%" [closed]

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Closed 7 months ago.
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function "%n%" not working even though I've loaded package dplyr.
mutate(category = ifelse(Year.Last.Used %n% c("2015", "2016"),"baseline","treatment"))
Caused by error in Year.Last.Used %n% c("2015", "2016"):
! could not find function "%n%"
How to fix the error?
I think that you probably want to use %in%..

Cannot install.packages(qwraps2) in R. What is happening? [closed]

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install.packages(qwraps2)
Error in install.packages : object 'qwraps2' not found
This package wont install, I get the above error. Can anyone help?
Try install.packages("qwraps2") instead.
it will not work without the quotes around package name

Error: unexpected SPECIAL in "as.Date(20110505, %Y%" [closed]

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I am not sure why I cannot do write the following code.
as.Date(20110505, %Y%m%d)
I receive the error given in the title. Can anyone help me out?
It should be string with the format also in quotes
as.Date(as.character(20110505), "%Y%m%d")
#[1] "2011-05-05"

Error: unexpected '[' in r [closed]

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I have an error
> for (i in 1:(cutoff_size-1)){work$group[i]=rep(c(0,1),c([i]-1,cutoff_size-[i]-1))}
Error: unexpected '[' in:"for (i in 1:(cutoff_size-1)){work$group[i]=rep(c(0,1),c(["
'cutoff_size' is numeric.
How can I solve this problem?
for (i in 1:(cutoff_size-1)){work$group[i]=rep(c(0,1),c(i-1,cutoff_size-i-1))}
this is probably what you're looking for.
[] are used to refer to position in array/data table/list.
If you're using it in a mathematical operation, you do not need the [] around the i.

help me in asp.net string.format [closed]

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I am getting error on following lines of code...plz help.
Index (zero based) must be greater than or equal to zero and less than the size of the argument list.
string order1= string.Format ("exec a_add_user '{0}','{1}','{2}','{3}','{4}','{5}','{6}','{7}','{8}','{9}','{10}'",TextBox_first_name.Text ,TextBox_last_name.Text ,TextBox_user_name.Text ,TextBox_password.Text ,DropDownList_telephone_code.SelectedValue +TextBox_telephone_no.Text ,DropDownList_mobile_code.SelectedValue +TextBox_mobile_no.Text ,RadioButtonList_gender.SelectedValue ,DropDownList_country.SelectedValue ,DropDownList_city.SelectedValue ,TextBox_address.Text);
You're specifying 11 format items but have 10 strings you're trying to append.

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