How do you add a header to a matrix?

I currently use 'fprintf' function on a line before i want to display my matrix but I feel like there is a better way to do it that I am unaware of.

Answer 1

[Image Analyst]

Well, you could make the variable a table (if you have R2013b or later). Then it will put a header line automatically in the command window when you display it.

From the help:

LastName = {'Smith';'Johnson';'Williams';'Jones';'Brown'};
Age = [38;43;38;40;49];
Height = [71;69;64;67;64];
Weight = [176;163;131;133;119];
BloodPressure = [124 93; 109 77; 125 83; 117 75; 122 80];
T = table(Age,Height,Weight,BloodPressure,...
    'RowNames',LastName)

In the command window:

T = 
                Age    Height    Weight     BloodPressure 
                ___    ______    ______    _______________

      Smith       38     71        176       124          93
      Johnson     43     69        163       109          77
      Williams    38     64        131       125          83
      Jones       40     67        133       117          75
      Brown       49     64        119       122          80

[James Young]

I coppied and pasted this code and it did not work.

[Adam Danz]

@James Young I copied and pasted the code and it did work, in r2021a, about a dozen releases after the answer was written. Could you be more specific about what you mean it didn't work? Are you using a much older release of Matlab? Did you get an error message? Did something unexpected happen?

[James Young]

@Adam Danz i am using hte r2020b I believe, but I coppied and pasted exactly what you commented and it returned the error:

Unable to use a value of type cell as an index.

Error in exam2_CME220_2019 (line 68)

T = table(Age,Height,Weight,BloodPressure,...

[James Young]

also I found a better way to do it using the code:

array2table(table, 'VariableNames', {'column 1', 'column 2', 'column 3', 'column 4'})

[Adam Danz]

There is no indexing in this answer, though.

I believe your error is that you have a variable named "table" which is a function name in this answer.

Answer 2

[Geoff Hayes]

Nicholas - if you just want to write a blank line (or header) before writing out your matrix, then using fprintf('\n'); is the correct way to do this.