I want to have a matrix/cell, that has strings inside that I can access and use later as strings.
For instance, I have one variable (MyVar) and one cell (site) with names inside:
MyVar=-9999;
site={'New_York'; 'Lisbon'; 'Sydney'};
Then I want to do something like:
SitePosition=strcat(site{1},'_101'}
and then do this
save(sprintf('SitePosition%d',MyVar),);
This doesn't work at all! Is there a way to have strings in a matrix and access them in order to keep working with them if they were a string?
This:
MyVar=-9999; site={'New_York'; 'Lisbon'; 'Sydney'};
SitePosition = strcat(site{1},'_101');
save(sprintf('SitePosition%d',MyVar));
Works fine and yields SitePosition-9999.mat, note the syntax changes in lines 2 and 3.
Is there something else you're expecting?
EDIT: Based on your comment
Check out the documentation for save regarding saving specific variables
New example:
MyVar=-9999;
site={'New_York'; 'Lisbon'; 'Sydney'};
SitePosition = strcat(site{1},'_101');
save(SitePosition,'MyVar');
Creates New_York_101.mat with only the variable MyVar in it.
Related
I'm writing a script to scrape from another website with Python, and I am facing this question that I have yet to figure out a method to resolve it.
So say I have set to replace this particular string with something else.
word_replace_1 = 'dv'
namelist = soup.title.string.replace(word_replace_1,'11dv')
The script works fine, when the titles are dv234,dv123 etc.
The output will be 11dv234, 11dv123.
However if the titles are, dv234, mixed with dvab123, even though I did not set dvab to be replaced with anything, the script is going to replace it to 11dvab123. What should I do here?
Also, if the title is a combination of alphabits,numbers and Korean characters, say DAV123ㄱㄴㄷ,
how exactly should I make it to only spitting out DAV123, and adding - in between alphabits and numbers?
Python - making a function that would add "-" between letters
This gives me the idea to add - in between all characters, but is there a method to add - between character and number?
the only way atm I can think of is creating a table of replacing them, for example something like this
word_replace_3 = 'a1'
word_replace_4 = 'a2'
.......
and then print them out as
namelist3 = soup.title.string.replace(word_replace_3,'a-1').replace(word_replace_4,'a-2')
This is just slow and not efficient. What would be the best method to resolve this?
Thanks.
I would like to convert a string to a variablename, so it can be read as a already restored variable.
So, I look through a file, and look at all the files. I use RESTORE to use the file in IDL, restore names this object as something slightly different. It names it as an object which we'll call map_1 (in the code it's called filerestore_name). This is related to the file name and I can recreate this variable name - however, its saved as a string.
Now, I pass this onto the make_cool_video procedure. However, althoughthis string now is exactly the same as the varialbe name, its still a string!.
Thus, as its a string, the procedure can't work.
filenames=FILE_SEARCH('rxrt*')
filenames_withoutextension = STREGEX(filenames,'rxrt_[0-9]+[a-zA-Z_]+',/EXTRACT,/FOLD_CASE)
restore, '/home/tomi/Documents/actualwork/'+filenames_withoutextension(18)+'.idl_sav',
filerestore_name = STRJOIN(STRSPLIT(filenameswithout(18),'_[0-9]+',/EXTRACT,/REGEX),'')
PRINT, filerestorename
make_cool_video, EXECUTE(filerestore_name),filename=filerestorenames, outdir='/path/to.file/'
retall
What I tried: using the RESTORE function and the associated RESTORED_OBJECTS to store pointers in an array, and then referring to the array. But I couldn't get the restore function to form an array.
Using EXECUTE(filerestore_name) however, this doesn't convert it as I was expecting.
I would recommend using SCOPE_VARFETCH() instead (it isn't as limited as EXECUTE() and is probably more efficient). You can do something like:
make_cool_video, (SCOPE_VARFETCH(filerestore_name)), filename=filerestorenames, outdir='/path/to.file/'
I wrote this, then immediately thought of the answer.
So,
Convert everything to a string:
string1 = "makecooljes, "+ filerestore_name, outdir='file/to/path/'"
result= EXECUTE(string1)
I have a phrase, where only some words will change, and I need to store those words on a variable.
Example:
phrase = "I cannot connect to server XPTO\TEST for the last five hours"
The only part that will change is XPTO\TEST and I need to store it on a variable so that I can use it later.
Any ideas, or is it possible?
Seems like you need some form of placeholders, if that is a case, then you can use string.format or string.gsub.
local t = {name="lua", version="5.3"}
x = string.gsub("$name-$version.tar.gz", "%$(%w+)", t)
--> x="lua-5.3.tar.gz"
With PHP for example you can achieve what you want without any extra work done, because there is a feature called string interpolation (wiki).
But at the same time Lua doesn't have one, that's why you can't do that without extra string post-processing.
i´ve got small problem and before I spend even more time in trying to solve it i´d like to know if what I want to do is even possible ( and maybe input on how to do it^^).
My problem:
I want to take some text and then split it into different strings at every whitespace (for example "Hello my name is whatever" into "Hello" "my" "name" "is" "whatever").
Then I want to set every string with it´s own variable so that I get something alike to a= "Hello" b= "my" and so on. Then I want to compare the strings with other strings (the idea is to get addresses from applications without having to search through them so I thought I could copy a telephone book to define names and so on) and set matching input to variables like Firstname , LastName and street.
Then, and here comes the "I´d like to know if it´s possible" part I want it to put it into our database, this means I want it to copy the string into a text field and then to go to the next field via tab. I´ve done something like this before with AutoIT but i´ve got no idea how to tell AutoIT whats inside the strings so I guess it must be done through the programm itself.
I´ve got a little bit of experience with c++, python and BATCH files so it would be nice if anyone could tell me if this can even be done using those languages (and I fear C++ can do it and I´m just to stupid to do so).
Thanks in advance.
Splitting a string is very simple, there is usually a built in method called .split() which will help you, the method varies from language to language.
When you've done a split, it will be assigned to an array, you can then use an index to get the variables, for example you'd have:
var str = "Hello, my name is Bob";
var split = str.split(" ");
print split[0]; // is "Hello,"
print split[1]; // is "my" etc
You can also use JSON to return data so you could have an output like
print split["LastName"];
What you're asking for is defiantly possible.
Some links that could be useful:
Split a string in C++?
https://code.google.com/p/cpp-json/
I have a structure in MATLAB called dat. I want to rename dat as an existing string.
Existing_str='NewName'
$(Existing_str)=dat
This fails as I don't think MATLAB lets me use the dollar sign in this way. The code below creates a copy of dat literally called Existing_str and destroys the Existing_str in the process.
Existing_str=dat
While the code below generates a collosal empty structure which clearly is not a copy!
eval(Existing_str)=dat
In the task I am actually trying to perform I don't know the name of the existing_str in advance so that is not a solution.
You were almost there with your `eval'. What you want is:
eval([Existing_str '=dat;']);
This works because you're composing a string inside your square brackets. If you just looked at the resulting string, it would look like NewName=dat; The eval command simply tells Matlab to evaluate the string as if you typed it into the command line.
You can use dynamic field naming (Bas's suggestion), and avoid eval:
For example, if you have just loaded a structure dat from a file 'somefile.ext' with some custom parsing function:
filename = 'somefile.ext'; % presume you actually have a list of files from dir or ls
dat = yourfunction(filename);
[~, name, ~] = fileparts(filename);
alldat.(name)=dat;
This is equivalent to:
alldat.somefile = dat;
Except that we've just automatically taken the name from the filename (in this case just by stripping off the path/extension, but you could do other things depending on the pattern of the filename).
The bonus of this is that you can then, say, with a structure that has fields alldat.file1, alldata.file2, alldat.file3, all of which have a subfield, say, size do things like this:
names = fieldnames(alldat)
for n = 1:length(names)
alldat.(names{n}).mean = mean(alldata.(names{n}).size);
end
Every sub-structure now has a field, mean, which contains the mean of the data. If you had a bunch of different named structures you would need to eval everything you wanted to do to them collectively, and the code becomes difficult to read and maintain.
The other option is a cell array. Here's an easy trick:
dat = % whatever you do to make this structure
alldat{end+1} = dat;
This just appends the new dat onto the end of an existing cell array. {end+1} ensures it doesn't overwrite existing data.