Learn more about dynamic, string, save, fileio matlab. I will study about structures and tables in matlab as soon as i will have time to do it, for the moment i was. For example, if a is b,a,a,b, then findgroups returns g as 2 1 1 2. You may receive emails, depending on your notification preferences. At the end of the faq it shows how to create a variable dynamically, for the rare case when you really need to do that. This matlab function returns 1 true if a is a string array. Is there a way to do this without having to store the name. In the for loop i also have the mean return and standard deviation for each security, can i. Jul 04, 2012 assigning input string as variable name. Splitting changes names from a 5by1 string array to a 5by2 array. Matlab does not support pointers, and creating some hackcode to improvise them will not be robust. Return information about netcdf data source matlab. If the input argument has no name, the inputname function returns an empty character array. Table variables, specified as the commaseparated pair consisting of datavariables and a variable name, a cell array of variable names, a numeric vector, a logical vector, a function handle, or a table vartype subscript.
The variables have their default parameters set, such as range and variable type. Each of those strings that are variable names are variables whos values are arrays and id like to concatenate whatever variables do exist. The invoking program is a script or function that calls the script or function containing the call to return. Specify the function who in exclusions to create a variable name that will be unique in the current matlab.
Remove missing entries matlab rmmissing mathworks nordic. Learn more about fopen, variable, variables in string, path, reading from file, accessing files. Headerfield object or a vector of headerfield objects. Plot titles in for loop with string and variable names. If s is a valid matlab variable name the isvarname function returns logical 1 true. If str is a string array or cell array of character vectors, genvarname returns a string. Jan 29, 2018 i would like to convert the name of my matlab variable to a string so that, for example, i can plot a variable and then use the name of the variable as a title for the plot. For example, create a field name from the current date.
Create variable from string matlab answers matlab central. How do i dynamically generate a file name for save in matlab. Learn more about string to variable, string, variable matlab. I want the user to be able to copy paste the values into matlab and then store them in a variable that they can. Unlike the contains or strfind functions, the order of the input arguments to findstr is not important.
Field names that you reference with expressions are called dynamic fieldnames, or sometimes dynamic field names for example, create a field name from the current date. If name is not found, then matlab returns an empty matrix. The only information i can find is how to put a variable in the title of a graph. In most cases, variables created within a function are local variables known only within that function. Construct valid variable name from string matlab genvarname.
How can a put a variable into a text string matlab answers. Return control to invoking script or function matlab return. Determine if input is string array matlab isstring. Follow 876 views last 30 days david polcari on 4 jul 2012. How do i create variable names from string variables. Using strings as variable names in a for loop matlab.
Return id associated with variable name matlab netcdf. Field names that you reference with expressions are called dynamic fieldnames, or sometimes dynamic field names. Assigning input string as variable name matlab answers. Otherwise it returns logical 0 false a valid variable name begins with a letter and contains not more than namelengthmax characters. Is there a way to do this without having to store the name of the variable along with the data. Create the following function in a folder on your matlab path. Follow 79 views last 30 days andrea tersigni on 24 feb 2017. How can i get the name of a matlab variable as a string. All eligible variables exist in the descriptions, but the variables unused in the auto setting have. How to print string or variable in plot title learn more about title, string, plot, filename, store matlab. Follow 87 views last 30 days mohamed abdalmoaty on 26 jan 2012.
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. Return control to invoking script or function matlab. Local variables are not available at the command line or to any other function. This can be useful if you are not certain which of the two input arguments is the longer one. This topic shows how to share variables between workspaces or allow them to persist between function executions. If so, is there a limitation of running it under one os at a time.
Pass string as variable into function matlab answers. How to convert a variable name to a string in matlab quora. The example 4 at this page seems to be similar, but i cant get it to work. G findgroupsa returns g, a vector of group numbers created from the grouping variable a. Choose a web site to get translated content where available and see local events and offers. In particular using dynamic strings like this to define indexing or variables names is liable to difficulttodebug errors. Using a string variable to name a diary file matlab answers. Environment variable value, returned as a character vector. Valid variable names can include letters, digits, and underscores. Oct 29, 2015 using strings as variable names in a for loop. For example, an input argument has no name if it is a number, an expression, or an indexing expression instead of a variable.
I wrote this code to be extensible to an arbitrary set of fields, so i think that additional id elements with corresponding values in data should work fine. It shows a number of different alternatives to creating a variable from a string, recommending strongly that you use one of the alternatives instead of creating a variable dynamically. Any leading and trailing blanks in either input argument are explicitly included in the comparison. Name a variable as string in matlab stack overflow. Therefore, matlab calls the builtin randi function, and returns a. I would like to convert the name of my matlab variable to a string so that, for example, i can plot a variable and then use the name of the variable as a title for the plot.
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. Essentially, you have to create your own function to do this. Aug 31, 20 i think the only way to really do it is from the answer from the question you cited. If a string array represents numbers, then you can convert it to a numeric array using the double function. A valid variable name begins with a letter and contains not more than namelengthmax characters. Hello, i wonder if there is a way to pass not only the value of a variable, but also its name to a function.
Follow 892 views last 30 days david polcari on 4 jul 2012. Function returning multiple vectors matlab answers. Workspace variable name, returned as a character vector. Check existence of variable, script, function, folder, or. When str2func is used with a character vector representing an anonymous function, it does not have access to the local function.
Matlab doesnt provide builtin functionality for this, but there is a workaround, as employed here. Find groups and return group numbers matlab findgroups. Another way to display a variable is to type its name, which displays a leading x before the value. I think the only way to really do it is from the answer from the question you cited. This matlab function returns information in the structure finfo about the entire netcdf data source specified by source, where source can be the name of a netcdf file or the url of an opendap netcdf data source. Matlab get string containing variable name stack overflow. Do you have an additional field in id that is called date or similar. What is the best way to get the name of a variable in a. The exclusions input can be a string, a string array, a character array, a cell array of character vectors. I have directed matlab to change paths to the directory where my.
Matlab provides a rich set of functions to work with string arrays. How can a put a variable into a text string matlab. I have tried textx,y,text num2str variable moretext with no luck. Valid variable names can include letters, digits, and. Specify attname as a character vector or string scalar ncid is a netcdf file identifier returned by netcdf. How do i create variable names from string variables matlab. I want the name of the output file to be saved, based on the string output. Learn more about variables, strings, matlab function, file matlab. Take advantage of matlab s functionality for getting the variable name of the input argument to a function. The reason i want the name of a variable is i dont want to hard code the name of a variable into a save command like this.
Return information about netcdf attribute matlab netcdf. 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. When you set the header property, matlab checks the fields of the header to ensure that they are appropriate for the message type. How to return the values of variables in gui matlab. I want the user to be able to copy paste the values into matlab and then store them in a variable that they can name themselves. Specify varname as character vector or string scalar. Hi, for the student version of matlab simulink, can one license be used under multiple os on the same machine. If a variable contains an empty array, disp returns without displaying anything. Variable in a string name matlab answers matlab central. Display value of variable matlab disp mathworks benelux. Variable descriptions, returned as a vector of optimizablevariable objects. Once the code works and give desired resutls then it would be easy for you to debug your problem in your current xls file, as you mentioned due to spaces or anything.
Determine if input is valid variable name matlab isvarname. 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. You can use g to split groups of data out of other variables. Assume the variable filename contains a string such as name1. Variable descriptions for optimizing a fit function. Description xtype,attlen qattncid,varid,attname returns the data type, xtype, and length, attlen, of the attribute identified in attname. Passing both the the variable name and value to a function. Reading a select number of characters from a string matlab. Not recommended find string within another, longer. Follow 1,944 views last 30 days osminbas on 12 apr 2012. The output argument g contains integer values from 1 to n, indicating n distinct groups for the n unique values in a. If you call the script or function that contains return directly, there is no invoking program and matlab returns control to the command prompt. Oct 28, 2016 how can a put a variable into a text string.
How to call a variable with user string input matlab. When operating on the rows of a, rmmissing removes any row that has missing data in the column corresponding to the variables specified. Follow 871 views last 30 days david polcari on 4 jul 2012. I simply want it to be displayed at a location of my choosing on the graph. To use this function, you should be familiar with the. Learn more about gui, variable, callback, uiobject. For experiments you make your own xls file so that you put the string you want.
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