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### Error with TIkz function and polar coordinates in Texlive/MacTex [duplicate]

I am encountering a rather odd typesetting error with Tikz when running the following code: \documentclass[]{amsart} \usepackage{tikz,pgfplots} \usetikzlibrary{patterns,calc,fadings,decorations} ...
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### TikZ coordinate calculation: Package tikz Error: + or - expected [duplicate]

TikZ calculates correctly the projection of a point and also draws it correctly, however after compiling LaTeX displays 2 error messages which I can not fix. Could you help finding what am I doing ...
1k views

### Why does TeX remove braces around delimited arguments?

On pp. 203–204 of the TeXbook, Knuth describes how TeX absorbs macros' arguments: delimited go until the first appearance of the delimiter, and undelimited go until the next token, in both cases ...
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### Problems with TikZ calculations

When can I use functions and do calculations in TikZ? How do I make this work: \draw (0,0) arc(0:90:sqrt(15)); %not ok why is this working: \draw (0,0) arc(0:asin(1):5); %ok with ...
220 views

### Incomprehensible behaviour of calc library with a “foreach variable”

If I compile the following code : \documentclass[12pt]{article} \usepackage[french]{babel} \usepackage{tikz} \usetikzlibrary{calc} \begin{document} \begin{tikzpicture} \foreach \i in ...
400 views

### Tikz thinks I'm dividing by 0 when plotting Planck's Law

I'm trying to plot Planck's law using tikz. This works fine for the most part, but tikz thinks I'm dividing by 0 if I try to plot certain areas of the law. Here's a minimally working example of what ...
234 views

### How can I smooth out the corners of a pgfplots plot

How do I smooth out the corners in the following graph? \documentclass{standalone} \usepackage{pgfplots} \begin{document} \begin{tikzpicture}[>=latex] \begin{axis}[ every axis/.append ...
853 views

### Can I use trig functions within polar coordinates

I am trying to use simple mathematical functions such as sin, cos, and sqrt within the declaration of a TikZ coordinate. I am finding that this works for cartesian coordinates, but breaks for polar ...
575 views

### Syntax error using PGF math function in coordinate

I would like to avoid setting too many of the values for the following picture too rigidly. For example, I would like to be able to set the position of point A and forever after that be able to ...
254 views

### Error caused by TikZ/PGF trigonometric functions

I'm a bit confused about a failure I'm seeing with an inline \cos call. In the code below there I perform contortions with \let, \pgfmathparse, and \pgfmathresult However, the commented line should, ...
384 views

### tikz code doesn't compile when opened after a while

I finished my phd a couple of months ago, compiled it then completely just fine. I opened it today to make changes and during compilation I get error messages about "missing number treated as zero". I ...