Updated Travis CI and README.

.travis.yml

@@ -7,6 +7,8 @@ matrix:
     dist: xenial
   - os: linux
     dist: bionic
+  - os: linux
+    dist: focal
 install:
   - sudo apt-get -yqq update
   - sudo apt-get -yqq install cppcheck

README.md

@@ -230,44 +230,38 @@ int main()
 
 #### Header row
 
-Option: `headerrow`
+Option: `headerrow`\
-
 Default value: `false`
 
 Header rows are bolded and centered.
 
 #### Header column
 
-Option: `headercolumn`
+Option: `headercolumn`\
-
 Default value: `false`
 
 Header columns are bolded and centered.
 
 #### Table border
 
-Option: `tableborder`
+Option: `tableborder`\
-
 Default value: `true`
 
 #### Cell border
 
-Option: `cellborder`
+Option: `cellborder`\
-
 Default value: `false`
 
 Requires `tableborder` to be `true`.
 
 #### Cell padding
 
-Option: `padding`
+Option: `padding`\
-
 Default value: `1`
 
 #### Alignment
 
-Option: `alignment`
+Option: `alignment`\
-
 Values:
 
 * `left` (default)
@@ -275,22 +269,19 @@ Values:
 
 #### bool to alpha
 
-Option: `boolalpha`
+Option: `boolalpha`\
-
 Default value: `false`
 
 #### Title
 
-Option: `title`
+Option: `title`\
-
 Default value: `NULL`
 
 The title is word wrapped based on the current width of the terminal, using [this](https://gist.github.com/tdulcet/819821ca69501822ad3f84a060c640a0) solution. Handles newlines, tabs and [Unicode characters](https://en.wikipedia.org/wiki/List_of_Unicode_characters).
 
 #### Border style
 
-Option: `style`
+Option: `style`\
-
 Values:
 
 0. ASCII
@@ -442,38 +433,33 @@ int main()
 
 #### Border/Axis
 
-Option: `border`
+Option: `border`\
-
 Default value: `true`
 
 #### Axis labels
 
-Option: `axislabel`
+Option: `axislabel`\
-
 Default value: `true`
 
 Requires `border` to be `true`.
 
 #### Axis units labels
 
-Option: `axisunitslabel`
+Option: `axisunitslabel`\
-
 Default value: `true`
 
 Requires `border` and `axislabel` to be `true`.
 
 #### Title
 
-Option: `title`
+Option: `title`\
-
 Default value: `NULL`
 
 The title is word wrapped based on the current width of the terminal, using [this](https://gist.github.com/tdulcet/819821ca69501822ad3f84a060c640a0) solution. Handles newlines, tabs and [Unicode characters](https://en.wikipedia.org/wiki/List_of_Unicode_characters).
 
 #### Axis/Border style
 
-Option: `style`
+Option: `style`\
-
 Values:
 
 0. ASCII
@@ -500,8 +486,7 @@ Values:
 
 #### Graph/Plot Color
 
-Option: `color`
+Option: `color`\
-
 Values:
 
 0. System default
@@ -544,6 +529,7 @@ Pull requests welcome! Ideas for contributions:
 
 * Add more options
 	* Add an option to print a border around graphs/plots
+	* Add options to word wrap and truncate long text in table cells
 * Add more examples
 * Improve the performance
 * Handle newlines, tabs and formatted text in the tables
@@ -551,4 +537,6 @@ Pull requests welcome! Ideas for contributions:
 * Support more graph/plot colors
 	* Support combining colors when functions cross
 * Support plotting multiple arrays of different sizes
+* Update the `-t, --table` options of column command from [util-linux](https://en.wikipedia.org/wiki/Util-linux) to use the Table library
+* Create a new CLI tool that uses the Graph library
 * Port to other languages (C, Java, Rust, etc.)

graphs.hpp

@@ -22,7 +22,7 @@ const char *const styles[][11] = {
 	{"━", "┃", "┏", "┳", "┓", "┣", "╋", "┫", "┗", "┻", "┛"}, //Heavy
 	{"═", "║", "╔", "╦", "╗", "╠", "╬", "╣", "╚", "╩", "╝"}, //Double
 	{"╌", "╎", "┌", "┬", "┐", "├", "┼", "┤", "└", "┴", "┘"}, //Light Dashed
-	{"╍", "╏", "┏", "┳", "┓", "┣", "╋", "┫", "┗", "┻", "┛"}  //Heavy Dashed
+	{"╍", "╏", "┏", "┳", "┓", "┣", "╋", "┫", "┗", "┻", "┛"}	 //Heavy Dashed
 };
 // {" ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " "}};//No border
 
@@ -181,35 +181,38 @@ size_t outputlabel(const long double label, ostringstream &strm)
 		}
 	}
 
-	if (!output and fmod(label, M_PI) == 0)
+	if (abs(label) >= DBL_EPSILON)
 	{
-		const char symbol[] = "π";
+		if (!output and fmod(label, M_PI) == 0)
+		{
+			const char symbol[] = "π";
 
-		intpart = label / M_PI;
+			intpart = label / M_PI;
 
-		if (intpart == -1)
+			if (intpart == -1)
-			strm << "-";
+				strm << "-";
-		else if (intpart != 1)
+			else if (intpart != 1)
-			strm << intpart;
+				strm << intpart;
 
-		strm << symbol;
+			strm << symbol;
 
-		output = true;
+			output = true;
-	}
+		}
-	else if (!output and fmod(label, M_E) == 0)
+		else if (!output and fmod(label, M_E) == 0)
-	{
+		{
-		const char symbol[] = "e";
+			const char symbol[] = "e";
 
-		intpart = label / M_E;
+			intpart = label / M_E;
 
-		if (intpart == -1)
+			if (intpart == -1)
-			strm << "-";
+				strm << "-";
-		else if (intpart != 1)
+			else if (intpart != 1)
-			strm << intpart;
+				strm << intpart;
 
-		strm << symbol;
+			strm << symbol;
 
-		output = true;
+			output = true;
+		}
 	}
 
 	if (!output)

tables.hpp

@@ -19,7 +19,7 @@ const char *const styles[][11] = {
 	{"━", "┃", "┏", "┳", "┓", "┣", "╋", "┫", "┗", "┻", "┛"}, //Heavy
 	{"═", "║", "╔", "╦", "╗", "╠", "╬", "╣", "╚", "╩", "╝"}, //Double
 	{"╌", "╎", "┌", "┬", "┐", "├", "┼", "┤", "└", "┴", "┘"}, //Light Dashed
-	{"╍", "╏", "┏", "┳", "┓", "┣", "╋", "┫", "┗", "┻", "┛"}  //Heavy Dashed
+	{"╍", "╏", "┏", "┳", "┓", "┣", "╋", "┫", "┗", "┻", "┛"}	 //Heavy Dashed
 };
 // {" ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " "}};//No border
 
@@ -433,8 +433,7 @@ int table(const long double xmin, const long double xmax, const long double xscl
 	const char *const aheaderrow[] = {"x", "y"};
 	// const char* const aheaderrow[] = {"", "x", "y"};
 
-	char **headerrow = NULL;
+	char **headerrow = new char *[columns];
-	headerrow = new char *[columns];
 
 	for (unsigned int j = 0; j < columns; ++j)
 	{