I have a list of exactly 384 elements.
Said list is ~3900 bytes.
Compressed into complex numbers is ~1950 bytes.
What kind of elements are you saving (integers, decimals)? The most efficient type of compression to use will rely on that.
In general, to get the most out of list compression it helps to understand how the calculator stores certain things:
1) Real numbers are always exactly 9† bytes, and store exactly 14† digits.
2) Complex numbers are nothing but two real numbers put together; they're 18† bytes and can store two 14-digit numbers.
3) Lists are just a bunch of real/complex numbers stored sequentially. A four-element real list will be 4*9=36† bytes; a two-element complex list (basically four numbers) will be 2*18=36† bytes.
3b) There is no such thing as a list with real
and complex elements; if a list has one complex element, then every other element is treated as such and takes up 18 bytes, even if they have no imaginary part.
4) Matrices are basically lists. An NxM matrix is just an N*M element list of real numbers, so a 4x5 matrix is 4*5*9=180† bytes.
4b) The OS doesn't support complex values in matrices, only real numbers. The reason for this is probably that matrices can quickly grow to over 10KB without the user realizing it, so doubling the size to allow for complex numbers would kind of suck.
Considering (3) and (3b), how did you use complex numbers to halve the size of the list? By adding complex list elements, you'll halve the
number of elements, but the remaining ones will double in size.
†This is for the data itself. For an actual variable (e.g. L1 or A), there are a few extra bytes containing the variable name and some other stuff.
To get said 384 element list:
99binomcdf(127,0->L1
augment(L1,L1
augment(Ans,L1->L1
0
If you want a 384 element list of all 99's, you could just use (assuming you want L1):
:384→dim(L1
:Fill(99,L1This also has the nice effect of not storing the result in Ans, so you don't need double the spare RAM
(however, storing the dimensions of the list
does modify Ans).
Matrices can be multiplied by a (real) number, but you can't add number to one.
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) to use the picture editor and I can add an option for it to split the pic into separate tiles.
However, since it prevents an error from giving the option to goto the code, it significantly reduces the risk of someone accidentally breaking the code.
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