Can i do a serial plotter with arduino and a lcd and NO A TFT???
Yes. You just need the right kind of LCD. What kind of LCD do you have?
Also did you read this when you posted here?
A lcd 16x2
It displays characters, not graphics. How do you plan to display a plot using characters?
My question is if are a library for have a serial plotter in a 16x2
or something similar
Did you Google for it? What do you hope that the library will do? It obviously can't force the hardware to do something it's not capable of..
You can edit a post, you don't have to delete.
ok, i google it
I want to transform numbers into lines on an LCD
horizontally or vertically, I don't care
I think you can make 8 custom characters, those could be lines. But they aren't going to look nice because you can only put one in each character space, and there are inter character gaps.
So, it's possible but it will be extremely coarse and chunky looking. It will not have high resolution at all. Have a really close look at what the display actually is.
lines no, but you can easily display bar graph
Topic moved.
An I2C, 128X64 is a very easy OLED display to use for this.
Inexpensive, ≈ $4.00
Lines bar graphs etc. are achievable.
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Two standard characters are already lines as well as blank, and depending on the character set, 0xFF may already be a full block, so for either lines or bars, you have a couple or custom characters left over as @b707 illustrates. 
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