Welcome to PF.ZFurdzik said:Summary:: labelling a point on x-axix with pgf-tikz
I'm confused about wrote a root of function when plotting here graph with pgf-tikz.
Any help is welcome.
To label a point on the x-axis with PGF-TikZ, you can use the command "\node" followed by the desired label inside curly braces. Then, specify the x-coordinate of the point using the "at" keyword. For example, "\node at (2,0) {$P$};" would label the point "P" at the x-coordinate 2.
Yes, you can customize the appearance of the label on the x-axis by adding options after the label text in the "\node" command. For example, you can change the text color, font size, or add a border by using options such as "color", "font", or "draw".
You can label multiple points on the x-axis with different labels by repeating the "\node" command for each point. Make sure to specify the x-coordinate of each point to position the labels correctly. For example, "\node at (2,0) {$P$}; \node at (4,0) {$Q$};" would label two points "P" and "Q" at x-coordinates 2 and 4, respectively.
Yes, you can use mathematical expressions as labels on the x-axis by enclosing them in "$" symbols. This will allow you to use mathematical symbols and functions in your labels. For example, "\node at (3,0) {$\frac{1}{2}$};" would label a point with the fraction 1/2 at the x-coordinate 3.
To remove the default tick marks on the x-axis when labeling points, you can use the "xtick=\empty" option in your axis environment. This will remove all tick marks on the x-axis, allowing you to only display the labels. Alternatively, you can use the "xticklabels=\empty" option to remove only the tick mark labels while keeping the tick marks themselves.