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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />001947 <br /> <br />Overwrite <br />The "Overwrite" suboption is designed <br />to overwrite an existing data file, Use the <br />following procedure to perform this task: <br /> <br />1, Select "Save" and then "Overwrite" <br />from the R2CROSS menu. R2CROSS <br />will list the files in the current directory <br />that you may chose to overwrite. <br />2, Select a file from the list using the <br />arrow keys and overwrite it by pressing <br /><ENTER>. The existing file will be <br />replaced with the current file. Do not <br />select the ori~inal R2CROSS, WK4 filel <br /> <br />Calculate <br />"Calculate" Imtlates all staging table <br />calculations and prints a five page data <br />summary (Figures F tluough Figure J). Be sure <br />that you have saved your input data set and that <br />the proper printer type has been specified prior <br />to running "Calculate", This operation may <br />take several minutes depending upon the speed <br />of your computer. A detailed explanation of the <br />four major calculations performed within <br />R2CROSS can be found in "Appendix A - <br />Program Calculations", <br /> <br />Graph <br /> <br />The "Graph" option allows the user to <br />view and print a cross-section plot of the stream <br />transect (Figure K), The cross section plot is <br />useful for revealing potential problems with the <br />input data set or potential errors in data <br />collection or data entry, Errors, such as misread <br />rod readings on waterlines or ground profiles, <br />are often easily detected on a cross section plot. <br /> <br />Retrieve <br />The "Retrieve" menu option has three <br />suboptions, "Path", "New file", and "Existing <br />file", These suboptions are used to change the <br /> <br />current file storage path and to retrieve data <br />files. <br /> <br />Path <br /> <br />The "Path" suboption changes the <br />current data storage location, A valid storage <br />path may be any drive and/or directory which is <br />in existence on the computer's hard drive. To <br />select a new path, follow these steps: <br /> <br />1. Select "Retrieve" and then "Path"from <br />the R2CROSS menu. <br />2. Type in the name of an existing <br />directory on your hard drive and press <br /><Enter>, <br /> <br />Subsequent files will be stored and retrieved <br />within this directory, In the event that a non- <br />existent path is entered, the computer will beep <br />and return to the main menu, The default <br />directory will remain in effect until a valid path <br />has been entered. <br />The "Path" suboption choice is not <br />frequently used. It may be appropriate if you <br />wish to organize R2CROSS data from different <br />streams into separate subdirectories, However, <br />file organization can also be accomplished by <br />simply using descriptive file names. If you do <br />decide to create separate directories for your <br />R2CROSS output files, you should copy the <br />files from the R2CROSS diskette into each of <br />these subdirectories so that they can be <br />retrieved when you want to create a new data <br />set. <br /> <br />New file <br />The "New file" suboption is used to <br />initiate data entry on a new cross section, It <br />erases the current worksheet from the screen <br />and replaces it with a blank R2CROSS.WK4 <br />worksheet. Read the introductory message and <br />press <ENTER> to initiate data entry, <br /> <br />-26- <br />