You lose variables stored in the function handle when you convert it to a character vector using func2str, and then back to a handle using str2func. Starting in r2016b, you can convert numeric arrays to string arrays using the string function. The only information i can find is how to put a variable in the title of a graph. Many beginners in programming struggle with the problem of hiding indices in the names of variables, because they do not have enough experiences with the efficient using of arrays. You can convert string arrays, character vectors, and cell arrays of character vectors to numeric values. Expression to evaluate, specified as a character vector or string scalar. For example, you can use str2double to convert the balance variable in the table below. Convert strings to double precision values matlab str2double. How to convert a variable name to a string in matlab quora. To convert the string, sin, into a handle for that function, type.
Feb 23, 20 because i want to concatenate this with other strings i need to convert the cell array to a string array. Run the command by entering it in the matlab command window. If a string array represents numbers, then you can convert it to a numeric array using the double function. Convert a string array to a cell array of character vectors. You clicked a link that corresponds to this matlab command. If str2num cannot parse the input as numeric values, then it returns an empty matrix. I simply want it to be displayed at a location of my choosing on the graph.
I have tried many converting functions but i dont get the correct final string array. If myfunc accepts a variable number of input arguments, then process all the arguments specified by varargin. Because i want to concatenate this with other strings i need to convert the cell array to a string array. Currently it is not clear, if your data are a double vector, a cell vector or any equivalent data also. Thorsten just needed some data to show how to use hex2dec. If you specify a conversion that does not fit the data, such as a text conversion for a numeric value, matlab overrides the specified conversion, and uses %e. How can a put a variable into a text string matlab answers. Convert character array or string to numeric array matlab. I never had tried it without explicitly converting the string by cellstr at first. Follow 2 114 views last 30 days osminbas on 12 apr 2012. To allow the matlab parser to perform stricter checks on your code and avoid untrapped errors and other unexpected behaviors, do not include output arguments in the input to the eval function. This example shows how to convert a variable in a table from a cell array of character vectors to a categorical array. Aug 31, 20 i think the only way to really do it is from the answer from the question you cited.
Datestring datestrt converts the datetime values in the input array t to text representing dates and times the datestr function returns a character array with m rows, where m is the total number of datetime values in t. The string function converts a numeric array to a string array having the same size. Instead, specify output arguments to the eval function to store the results of the evaluated expression. I think the only way to really do it is from the answer from the question you cited. Convert character arrays to string arrays, leaving other arrays. It might not make sense to define a string with a variable and try to convert it to the variable itself but it will be helpful in my code. If you apply a text conversion either %c or %s to integer values, matlab converts values that correspond to valid character codes to. To convert data to string arrays, use the string function. Learn more about matlab, cell arrays, seeking vulnerability matlab. In addition, str2num uses the eval function, which can cause unintended side effects when the input includes a function name. This option ensures that the result of evaluating str will also contain the class information.
Matlab provides string arrays to store pieces of text. You can get the string of hex digits into your code by hard coding it, by accepting it as an input argument to your function, or even using the input function. Each element of a string array contains a 1byn sequence of characters. Hello, i have a variable vector defined at the beginning of my code, say a1. Convert cell to string matlab answers matlab central. Jul 08, 2011 each of those strings that are variable names are variables whos values are arrays and id like to concatenate whatever variables do exist. Create a function that takes any variable as an input and returns the string equivalent of that variables name as an ouput like so. You can convert numeric values to strings or character vectors.
Although the date string, d, and the datetime scalar, t, look similar, they are not equal. Format of the output fields, specified using formatting operators. As an alternative, you can convert a character vector to a string using the string function. The variable, selfassessedhealthstatus, contains four unique values. How to print string or variable in plot title learn more about title, string, plot, filename, store matlab. Construct character vector from function handle matlab func2str. Convert date and time to string format matlab datestr.
X str2numchr converts a character array or string scalar to a numeric matrix. For example, the statement evaloutput,expression is not recommended. Convert cell to variable name array matlab answers. Convert between datetime arrays, numbers, and text overview. Convert matrix to characters matlab mat2str mathworks. Matlab provides a rich set of functions to work with string arrays. Starting in r2017a, you can create strings using double quotes, such as str greetings friend. Dec 20, 2012 im still confused about string, cell string, because it looks like this joins elements of incompatible types. Starting in r2017a, you can create a string using double quotes. If str is a cell array of character vectors or a string array, then x is a numeric array that is. Convert between datetime arrays, numbers, and text matlab. Oct 28, 2016 i have tried textx,y,text num2str variable moretext with no luck. Construct character vector from function handle matlab. If you use genvarname to generate a field name for a structure, matlab does create a variable for the structure and field in the matlab workspace.
Instead, consider converting variables to string arrays, categorical arrays, or cell arrays of character vectors. Examples functions release notes pdf documentation. If a is a string array, then char converts the string array to a character array. How to convert string into filename then use load comment. A formatting operator starts with a percent sign, %, and ends with a conversion character. May 12, 2011 i have a question on how to make use of string variable specifying a filename on the load command to load the data into the workspace. B convertcharstostrings a converts a to a string array if a is a character array or a cell array of character vectors. This matlab function treats n as a matrix of integers and converts it to a character array that represents the integers.
The output contains one date or duration in each row. How can a put a variable into a text string matlab. If str is a character vector or string scalar, then x is a numeric scalar. To avoid these issues, use str2double as an alternative. If myfunc accepts a variable number of input arguments, then process all the arguments. Let us use the whos command to check the variable created above. Best practice is to avoid creating table or timetable variables that are character arrays. For example, you can use the split, join, and sort functions to rearrange the string array names so that the names are in alphabetical order by last name split names on the space characters. If str2double cannot convert text to a number, then it returns a nan value while the str2num function can also convert text to numbers, it is not recommended. By default, the output of mat2str represents an array of doubles.
X str2doublestr converts the text in str to double precision values. Convert text in table variables to categorical matlab. Convert string to variable matlab answers matlab central. If you pass a function name string in a variable, the function that receives the variable can convert the function name to a function handle using str2func. It is the name of a builtin matlab function that you may need later, and wont be able to use because you will have overshadowed it. Please post the input data such that we can know the class and the size. By default, datestr returns text in the format, daymonthyear hour.
Im still confused about string, cell string, because it looks like this joins elements of incompatible types. Convert between datetime arrays, numbers, and text. Convert integers to characters matlab int2str mathworks. Create an array of integers and convert it to a character vector. Matlab will execute the above statement and return the following result. The input can include spaces, commas, and semicolons to indicate separate elements. This example shows how to convert a variable in a table from a cell array of character vectors to a. For example, the text might come from a text file or spreadsheet. Matlab considers all variables as arrays, and strings are considered as character arrays. Apr 25, 2012 convert cell to string, or assign variable. To determine whether a word is a matlab keyword, use the iskeyword function.
T2 convertvars t1,outagetime,datetime converts the type of the variable outagetime. Sep 03, 2011 convert a variable parameter to string. If you did not already convert it to numeric values when importing it into matlab, you can use the functions shown in this example. Learn more about strings, variables, conversion, workspace, sprintf, str2, eval. If str is a string array or cell array of character vectors, genvarname returns a string array or cell array of character. Text representing dates and times to convert, specified as a single character vector, a cell array of character vectors, or a string array, where each row corresponds to one date and time.
Follow 80 views last 30 days jonas k on 21 jun 2017. Evaluate matlab expression matlab eval mathworks nordic. Splitting changes names from a 5by1 string array to a 5by2 array. Convert matrix to string matlab mat2str mathworks australia.
Convert char to string matlab answers matlab central. If the str input contains any whitespace characters, genvarname removes then and capitalizes the next alphabetic character in str. Each of those strings that are variable names are variables whos values are arrays and id like to concatenate whatever variables do exist. Convert cell to string, or assign variable matlab answers. When the input argument is a string array, the double function treats each element as the representation of a floatingpoint value. Convert selfassessedhealthstatus to an ordinal categorical array, such that the categories have the mathematical ordering poor convert it into a variable. Convert cell array to string matlab answers matlab central. Create a function that takes any variable as an input and returns the string equivalent of that variable s name as an ouput like so. To represent a different numeric type in the output, use the class input argument. Balance represents numbers as strings, using a comma as the. I have tried textx,y,text num2strvariable moretext with no luck.