extraction

问题 I have geographical data which has 14 variables. The data is in the following format: QUADNAME: rockport_colony_SD RESOLUTION: 10 ULLAT: 43.625 ULLON: -97.87527466 LRLAT: 43.5 LRLON: -97.75027466 HDATUM: 27 ZMIN: 361.58401489 ZMAX: 413.38400269 ZMEAN: 396.1293335 ZSIGMA: 12.36359215 PMETHOD: 5 QUADDATE: 20001001 The whole data has many previous variables in the sequence. How can I extract the coordinates ULLAT, ULLON and LRLAT from the data into three lists, so that the each row corresponds

问题 I'm using the regex in Jmeter 2.8 to extract some values from JSON responses. The response is like that: { "key": "prod", "id": "p2301d", "objects": [{ "id": "102955", "key": "member", ... }], "features":"product_features" } I'm trying to get everything except the text between [{....}] with one regex. I've tried this one "key":([^\[\{.*\}\],].+?) but I'm always getting the other values between [{...}] (in this example: member ) Do you have any clue? Thanks. 回答1: Suppose you can try to use

问题 I have a static library static_library.a How to list functions and methods realized there. or at least how to look is there concrete function 'FUNCTION_NAME' realized? 回答1: Write nm static_library.a This gives you complete list of symbols in the library. 回答2: Use nm <library> as mentioned. If this is a library built from C++ you should use the nm --demangle option to get back the original symbol names rather than their "mangled" versions. 回答3: The nm lists the symbols from object files $ nm

问题 I need to unzip a .ZIP archive. I already know how to unzip it, but it is a huge file and takes some time to extract. How would I print the percentage complete for the extraction? I would like something like this: Extracting File 1% Complete 2% Complete etc, etc 回答1: here an example that you can start with, it's not optimized: import zipfile zf = zipfile.ZipFile('test.zip') uncompress_size = sum((file.file_size for file in zf.infolist())) extracted_size = 0 for file in zf.infolist():

问题 How to remove distances from Delaunay triangulation which are larger than I need? Example data: x<-rep(1:12, c(2,2,7,9,10,5,4,6,10,10,9,4)) y<-c(1,2,1,2,1:3,5:8,1:9,1:10,2,7:10,8:11,7:12,3:12,3:12,4:12,5,8:10) x_plus<-seq(0.2:0.8, by=0.1) x<-x+sample(x_plus, 78, replace=TRUE) y<-y+sample(x_plus, 78, replace=TRUE) Plotting the map: plot(x,y) Delaunay triangulation with tri.mesh() - package(tripack) my.triangles<-tri.mesh(x,y) plot(my.triangles, do.points=FALSE, lwd=0.2) points(x,y, col = "blue

问题 Given a string of characters, how can I go through it and assign all the numbers within that string into an integer variable, leaving out all other characters? I want to do this task when there is a string of characters already read in through gets() , not when the input is read. 回答1: unsigned int get_num(const char* s) { unsigned int value = 0; for (; *s; ++s) { if (isdigit(*s)) { value *= 10; value += (*s - '0'); } } return value; } Edit : Here is a safer version of the function. It returns

问题 Hi Im trying to extract a price and strip the extract of some unwanted text. So that "US $149.99" becomes "149.99" TAG POS=1 TYPE=SPAN FORM=NAME:donasub ATTR=ID:donaprice EXTRACT=TXT SET donaprice EVAL("var s=\"{{!EXTRACT}}\"; s.replace(\"US $\", \"\");") SAVEAS TYPE=EXTRACT FOLDER=C:\demo FILE=donafiles.csv I still get the full string "US $149.99" in the extract. What am I not doing right. 回答1: You need to escape special characters with \\ . In this case it is "$" SET donaprice EVAL("var s=\

问题 I have been able to extract information of of all files in a folder and also all subfolders of that particular folder, but when I want to extract information (i.e. file type, file path, file size and file name) of all the files and folders of a particular DIRECTORY, I am not able to do it. It says PERMISSION DENIED. The script is as follows: Option Explicit Dim objFSO,objf,objfolder, objFile, strFileProperties, strFiles,OBJFLD,objfile2 dim objf1,objfile1,objtextfile,strfolderproperties

问题 Is there a simple way to extract the main frequency/period from a signal (without resorting to the FFT)? For my requirements, this can result in either a value for the main frequency (e.g. 3Hz) or a value representing the strength of a target frequency. For example, in the following 1-D signal the frequency is about 4Hz, assuming the sampling rate is 50ms. How can this be extracted from the data programmatically? 10 2 1 2 8 10 8 2 1 1 8 10 7 1 1 2 7 10 5 1 回答1: Use Auto Correlation ! %using

问题 The code I have (which comes from here A continuation of... Extracting data from an API using R) gives a very complicated output. I can extract almost all I need except for a data.frame that's nested within the list. Without doing anything, it gives me this error: Error in .rowNamesDF<- (x, value = value) : duplicate 'row.names' are not allowed In addition: Warning message: non-unique values when setting 'row.names': ‘1’, ‘10’, ‘11’, ‘12’, ‘13’, ‘14’, ‘15’, ‘16’, ‘17’, ‘18’, ‘19’, ‘2’, ‘20’,