formulation | Django Form rendering helper tags - DEPRECATED in favour | Form library

I am trying to create a vector where I have 3 repetitions of the number 1, then 3 repetitions of the number 2, and so on up to, for instance, 3 repetitions of the number 36.

c(1,1,1,2,2,2,3,3,3,4,4,4,5,5,5...)

I have tried the following use of rep() but got the following error:

Error in rep(3, seq(1:36)) : argument 'times' incorrect

What formulation do I need to use to properly generate the vector I want?

I am trying to solve a low thrust optimal control problem for Earth orbits, i.e. going from one orbit to another. The formulation of the problem includes six states (r_1, r_2, r_3, v_1, v_2, v_3) and 3 controls (u_1, u_2, u_3) with a simplified point model of gravity. When I specify the full initial state and half of the final state, the solver converges and yields a good solution. When I try the full final state, the problem is over constrained.

My thought on how to remedy this is to allow the trajectory to depart the initial orbit at any point along the orbital curve and join the final orbit an any point along the final orbital curve, giving it more degrees of freedom. Is there a way to constrain the initial and final values of all 6 states to a cspline curve? This is what I have tried so far:

I want to make a ggplot for which the y-axis labels are formatted by a pre-made list. I have found that if I pass arguments to the labels option in scale_y_continuous() function in ggplot directly it works fine, but if I pass them via do.call it throws an error, even though (I think) these are equivalent.

Here is an example:

I have the following string:

In a given dataframe, I need to filter the rows on separate columns, one at a time, using the same condition. The following formulation does not work. Any suggestions?

I have a function that takes multiple arguments.

I want to use the blend or tblend filters in conjunction with the t variable's between statement. I'm open to other solutions that will achieve the same effect.

I know an image can be transposed over a video, e.g. between 00:00:01.000 to 00:00:02.000:

ffmpeg -i input.mkv -i input.jpg -filter_complex \ "[0:v][1:v] overlay=10:10:enable='between(t,1,2)'" output.mkv

Blurring a video at the same time can be done with smartblur:

ffmpeg -i input.mkv -vf "smartblur=enable='between(t,1,2)'" output.mkv

Changing the hue angle, e.g. by 90 degrees, can also be done:

ffmpeg -i input.mkv -vf "hue=h=-90:enable='between(t,1,2)'" output.mkv

Nothing from my searches or in the official documentation, however, explains how to compose a command using the blend or tblend filters in conjunction with the t variable's between statement. I've tried a number of formulations, but they all lead to errors. Is this simply not possible? Or is there another way to structure the command?

I have a data frame and I want to normalize each number based on the minimum of that row and the maximum of that row based on this formulation.

I am dealing with a string similar to this:

ABCD_EFGHI-78-32#1-R77.2_301009_1_AB3_CD

delimiter is: _

I need a regex that wont match if second portion [EFGHI-98-32#1-R77.2] contains case insensitive "TesT" anywhere within that block, but that would match for any other case.

So I started like this: