# Intro to Graphing with Logger Pro | Rex Rice | Doc Physics ## Метаданные - **Канал:** Doc Schuster - **YouTube:** https://www.youtube.com/watch?v=mca1oImIHWE ## Содержание ### [0:00](https://www.youtube.com/watch?v=mca1oImIHWE) Segment 1 (00:00 - 05:00) now that you've been told that you can use the computer for graphing I'd like to show you how to use a program called logger Pro which will be provided to all of the students at Clayton High School and so once you have it installed on your computer there will be an icon looks something like this that you can click on in order to start up the program when it starts up you'll see that you get a blank graph and a blank data table and the first thing that I want you to do because we're gonna make a pretty complicated data table over here ultimately is to click on the graph get delete so that you have just a data table page notice up here that we're on page 1 and so I'm going to click on the data table I'm going to grab one of these handles and I'm going to spread the data table out a little bit so that we can add the other columns or get there let's assume that the data we're creating is for the wheel and axle lab and so I might decide to call this data set wheel and axle maybe this is for the low incline so I'm naming the data set so I can tell what it is when I look at it in the computer and if I were to make these columns wider I might see the whole name once I add some extra columns that whole name will come up there now in that wheel and axle experiment or independent variable which we conventionally put on the left side was clock reading so if we click double-click on X we don't want to call that X because this column is our column for clock readings so I'm going to call that clock reading and the symbol we use for clock reading is a lowercase T let's assume I did my experiment getting my units of time in seconds in cases where the quantity and this will normally happen with your independent variable increases in some regular way by equal increments you can use this generate values option and in this case I want to start at a clock reading of zero end six in increments of one I now hit done you'll notice that this column becomes T in seconds with zeros of six on there if I expand this to where it's white enough for the word clock reading to show up the whole word will be there and if I shrink it down I'll just see the symbol for it what a double-click on this column again because I want to show you what you can do with the options command one of the things you can do is to change your point symbol we call these point protectors in this class and typically the empty circle is going to be the one I want you to use and I like your default color to be black this will make it show up a lot better on black and white printers you're doing this in color you can get away with the plethora of colors that are available to you here but on a black and white printer I highly recommend you stay with black I mean your displayed precision I represent in this case that we go to the tenth of a second so the decimal places are going to be one when I click on that it changes all of the values to the tenth of a second the other value that we have in this graph would be another variable which is our dependent variable is positioned so if I double click on that and go to column definition I can change the Y to position I can take change the short name to X and suss assembly is for position unfortunately there's no way to put up an arrow over the top of that so we're going to be stuck with just the X and we're going to measure that let's say in meters in this case now this time we're not going to use generate values because being the dependent variable its values gonna vary based on what o'clock readings we use so we aren't going to use the generate values we're going to go to options we're going to change this red which would automatically chose two black and we're gonna go with decimal places manual 2 1 empty circle looks good medium that all looks good so let me click on that it's got a column called position and meters now I'm going to type in the data so if you click on the cell you can type in the value and the values that I'm going to get are zero point zero I'm just going to put 0 it'll put it in a zero point zero I just hit return or enter and it went down but I had already told loggerpro earlier ### [5:00](https://www.youtube.com/watch?v=mca1oImIHWE&t=300s) Segment 2 (05:00 - 10:00) that that's the way I wanted it to do it so I want to show you how to do that you go to the logger Pro menu and select Preferences down here in the lower left is where you get a chance to tell it whether you want it to go down or right after you hit enter I think you're going to find in this class you're going to be entering columns of data rather than data points one at a time so I recommend you change this down once you set your computer to do that the first time it's because these are application preferences it's going to tend to do that every time also if you make the file you're working on a startup file it'll automatically default to all the stuff that you have there although you'll probably want to take the data out of it because it'll look you'll have the same data every time you start the computer once we have that taken care of I don't think you need to worry about any of these other options that are in here for now so now we're going to start putting in the rest of the data in the position column so let's say at a clock rating of 1 I'm in a position of 5. 0 at a clock reading of two I'm at a position of 20. 0 at a clock rating of 3 I'm out of position in 45. 0 o'clock reading of 4 seconds I'm at a position of 80 meters at a clock reading of 5 seconds I'm out of position of 125 meters and a clock reading of 6 seconds I'm not a position of 180 meters now we have a data table we have places that we can add other columns which we'll do in another video that follows this one now what we want to do is to make a graph of this so right now we have but one page and we don't have the option to go forward or backward because we only have one page but if we come to the menu called page we can insert a page that's with this add a page convention we can also do some other modification of the pages there but for right now we want to add a page and I suggest this first time we're just going to make a blank page and not worry about any of these options after the current page makes sense all of the data table followed by the graph so when I do that I get a blank page you might think well I lost my data table but up here it says page two if I hit previous it'll go to page one if I add next two and if I click in here I can go directly to any page that I want he's simply selecting so we're going to go to the graph the page we're going to use for the graph and in this case we're going to use the insert command until it graph now if we look at our data table page you'll notice that clock reading was in the Left column position was in the right column the computer is going to default to assume that whatever you put in the Left column is your independent variable and it'll plot that on the horizontal axis and whatever you put in the right column is the dependent variable and it'll put that on the vertical axis so we go to page two you'll see it did that put the position on the vertical axis because it was the dependent variable in the right column and clock reading on the x axis or horizontal axis because it was in the left column which is the normal place from the independent variable we're gonna drag this graph larger because we're gonna want to fill up as much of the page as possible and you'll notice that the graph it did go ahead and plot a bunch of lines on here but you can't see your data points and there's a bunch of straight lines connecting what would be our data points so we're gonna have to make some modifications this graph it's very easy to do we're gonna double click on the graphs we're gonna put our cursor somewhere on the we're gonna go to graph options so it's the left tab and the first thing we're going to do is to put in the title of this graph and our convention is to put dependent variable which in this case it's position versus independent is clock reading you want to always deselect connect points because we don't connect the dots in here and we always do point protectors and loggerpro calls these things point symbols and you really don't need anything else clicked here except the point symbols later on you might want to play around with tick styles because this can adjust how many lines it puts in the grid over here if I do that and I hit OK you'll notice that now I see the data points but I don't have the connecting lines anymore you could extend this a little beyond 6 so that you can see all of that point and you can extend this a little bit below and to the left of those zeros if you want to see that whole point but it would be fine if it worked it like ### [10:00](https://www.youtube.com/watch?v=mca1oImIHWE&t=600s) Segment 3 (10:00 - 14:00) this the next thing that you're going to do and you could have done it while you were still have that up there double-click the graph and this time instead of looking at the graph options that we were looking at before we're gonna look at the axes options notice that there's a little rectangle up here on the upper left that goes with the y-axis anything that you do in here only affects the y-axis there's another rectangle along the bottom here labeled x-axis anything you do here affects the x-axis so the one thing that we almost always want you to do is on the scaling select Auto scale from zero note that we just did that for the y-axis and it has checked position as the quantity that's plotted on that axis if I wanted clock reading to be plotted I could uncheck this and check clock reading that's not what we want position you could also plot both of these on that axis but that actually doesn't make any sense here on the horizontal axis we want to plot clock reading although we could have in position I'm gonna keep it at all right clock reading I'm sorry and again independent of what we did here on the y-axis we're going to tell it to auto scale this axis from zero when we do so we end up with actually it did it before already for us but this has already been Auto scaled to fit all of our data and the x and y axes cross at zero which is what we want them to do the last thing that we need to do is to put a curb fit on here and when you did this by hand you had to sketch into the curve here if you click on curve fit in this class at least early on about the only type of curve fit besides linear fits that you're going to do is what we call a powered fit so if you click on that and then select try fit you'll notice that it gives you a nice curve that looks like it fits so we're gonna hit OK and now we have a curve they really don't want you to do anything with the information that's in this box so I'm gonna click on this select no by the way I want to clicked on it I right clicked on it if you don't have a two button mouse or you don't have your Mac Mouse setup that way you can hold down the control button then click on it will give you the same thing curve fit options I think I want you not to show this on the graph so if you click on that will go away and you'll just see a curve of best fit so that's how you plot a basic graph in logger Pro first of all you put the data in and then how you plot a basic graph and once you have that done you're ready to print it so let me show you the last thing you need to know about this for printing when you print graphs you're gonna want to go to file and instead of selecting print you're going to want to put print graph when you do that you want to put your name in there so I'm going to put mr. rice and I'm a comment I'm going to say something about the experiment so this is going to be my meal and axl experiment would like you to always put the date on there it always include the page number on there and you can decide whether you want the page title and file name to be on there the other thing you want to do is always have it select print footer because I want to see your name and the date anytime you print on one of these once you've done that the other thing that you're going to want to do is to and I guess I actually should have shown you this first I want you to go to file page setup and I want you to select the landscape mode I want you to print it sideways on the page so that we fill up the page as much as possible once you've done that then you can go back and do what I showed you before let's just print graph you remember the things I put in there before the data selected footer is selected but you know K then a standard dialog box for printing will come up and you can hit print in this room the default printer will be this room 203 LaserJet printer so you're not going to have to mess with that at all make sure that your graph is what you want it to be before you prep so you don't waste paper or toner so that's how we do graphs in logger Pro in the next video I'm going to show you how to add calculated columns and complete an analysis like you would do for the wheel and axle experiment --- *Источник: https://ekstraktznaniy.ru/video/42000*