Now I have seen what goes on into varfun, I am not so sure that this solution will be faster. go figure.)ĭiscussion: Initially I tried to make the varfun solution work (hence the T2 name of the result), and wanted to recommend this one, because I didn't like the table/cell/table conversion of the other solution.
Notice that again we had to reassign the column headers on the newly created table ( the irony is varfun choked trying to apply the function on the column headers, but does not re-use or return them in the output. This will produce the same table than in the example 1 above. T2.Properties.VariableNames = T.Properties.VariableNames For example: cellnum2str = with that, you can now use it to convert your table: %% Use "varfun" The trick to overcome that, is to send a customised version of num2str which will accept cell arrays. As we saw above, num2str errors when met with a cell array.
#TABLE MATLAB CODE#
If you look at the varfun code at the line indicated by the error, you'll notice that internally, data in your table are converted to cell arrays and the function is applied to that. You'd think that a simple T2 = varfun(, T ) Matlab uses copy-on-write, so passing pointers (adresses) to a function will not speed it up. For faster code also prealocate memory for variables, Matlab requires contiguous memory usage. Varfun is for Tables the equivalent of cellfun for cell arrays. Matlab is a column vector based language, load memory columnwise rst always.
#TABLE MATLAB PLUS#
These method is suitable for relatively small tables, as the round trip table/cellarray/table plus the call to cellfun will probably be quite slow for larger tables. Notice that we had to recreate the column names (copied from the initial table), as these are not transferred into the cell array during conversion. Produces a new table containing only strings. T3.Properties.VariableNames = T.Properties.VariableNames T3 = cell2table( cellfun(, table2cell(T), 'uni',0) ) I recreated a table with the same data than in your example. There are 2 possible way to work around that to convert all your values to character arrays: num2str() is also valid), but it will bomb out if you try to throw a cell array at it (even if all your cells are numeric).
However, it can deal with purely numeric arrays (e.g. There are two ways to open the Import Tool.Yes, num2str accept a single variable of any type and will return a string, so all these operations are valid: > num2str('123') "NorthEast" 05:54 0 0 NaT "equipment fault"įinally, you can interactively preview and import data from spreadsheets or delimited text files by using the Import Tool. Region OutageTime Loss Customers RestorationTime Cause Assign the BMI values to a new table variable. Calculate body mass index, or BMI, using the values in patients.Weight and patients.Height. This notation is similar to the notation you use to access and assign data to the fields of a structure.įor example, add a BMI variable to patients.
Dot notation refers to table variables by name, T.varname, where T is the table and varname is the variable name. Once you have created a table, you can add a new variable at any time by using dot notation. The fprintf() function is used to display formatted text and variables in MATLAB. Print Table Using the fprintf() Function in MATLAB.
#TABLE MATLAB HOW TO#
This example shows why tables have rows and variables, not rows and columns. In this tutorial, we will discuss how to print a table using the fprintf() function in MATLAB. As the BloodPressure variable shows, a table variable itself can have multiple columns. The table is a 5-by-6 table because it has six variables. LastName Age Smoker Height Weight BloodPressure
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