Note the related FEX utility tcprintf, which implements ANSI sequences for color-coding the Matlab console output. In those old days, we used the ESC-[ sequence to add text formatting to the console text. The [\b sequence is reminiscent of the CSI ANSI sequence used in days of yore, on non-graphic consoles. Since ‘\b’ translates into the BS character, we can directly use char(8), as follows:ĭisp ( ' 8 ' text' ] )ĭisp(' 8 ' text']) MathWorks made the hack very specific so that it would be close to impossible to come by it by mistake. By the way, it won’t work if you use any other combination, or if there are not exactly two such in the displayed text. The \b hack relies on the fact that \b is actually the standard back-space control-character (BS, or ASCII 8), which erases the preceding \b couple. Of course, we can still use cprintf to display any color in the rainbow, orange included: By redirecting STDOUT, Carsten was able to see that by adding '\b' to the output text, anything between the brackets was given an orange color. This is similar to the bypass that I explained last year, for the bold formatting. While errors have for ages been rendered red by the simple act of directing their output to STDERR, warnings are output to STDOUT and so a bypass was naturally devised. This made sense: after all, recent releases have started to display warnings as orange text on STDOUT. I followed this up last year with the relatively new ability to display bold text formatting, using either fprintf or cprintf.Ī short while ago, Carsten Allefeld (a regular on this blog) alerted me to the fact that recent Matlab releases have added yet another undocumented feature, this time the ability to specify orange formatting to the output text. Back in 2009, I explained the undocumented ability to display red or hyperlinked text using fprintf, or co lo red and underlined text using my cprintf utility. This is scrambled.Matlab’s Command Window text is notorious for its boring black & white appearance when sending output via the built-in fprintf or disp commands. We see that it read the 2 values in the first column and then the 2 values in the second column and printed them in the first row. % Since there are 4 elements in each row, we try 4 %d format strings. % This can be fixed by putting the transpose, S' in the fprintf statement: The printed matrix is the transpose of matrix S. We see that it read the 3 values in the first column, but printed them in the first row. % Since there are 3 elements in each row, we try 3 %d format strings. Consider this example of a square matrix.: This can result in printing the transpose of a square matrix. If you have more than one format string, it will print as many values as there are format strings, then cycle back to the beginning of the format string to continue printing the remaining characters. If your message has a single format string, they will be printed as a column. However, fprintf() can print all of the values with a single instruction. With this approach, you would only use the \n for the last element of a row. One way to print the values of a matrix is to use nested for loops and print one value at a time. Since both the mean and the standard deviation are between 1 and 10, we want 3 significant digits to get 2 decimal places. Hint: num2str() lets you specify the number of significant digits, as opposed to the number of decimal places. This video explains how to display a number with the disp() command:Ĭreating formatted outputs using the disp() command in MATLAB. No credit if you you just type in the values. Make a similar output using disp( ) and num2str( ) functions with a single disp() function. No credit if you you just type in the values.Ĥ. You need to use 2 proper %f format strings. Hint: a number like 1.34 needs 4 characters, so use %4.2f Where x.xx and y.yy will be replaced with your values. Display the mean and standard deviation values to the screen using fprint( ) with a %f format code (with 2 decimal places) to create a string like: Compute the mean and standard deviation of the vector.ģ. X = randi(6,1,36) % Create a vector with uniform random integers between 0 and 6.Ģ.
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