i am getting some data via RS 232 port and plotting it straight to excel, which comes out to be in forms of waves you can say sine waves, now i need to calculate area under the curve, say like if i highlight some area it will automatically calculate the area, or if i select two points on the curve it will calculate the area. please help me out i am really stuck at this part.
View 9 RepliesFor Excel 2007 -
I am looking for a function [or method] to calculate a polynomial curve fit. I can do it on a graph with the existing graph and chart tools, but I need to calculate it myself. Does such software exist somewhere in my Excel 2007 package, or can anyone recommend a freeware program? I am hesitant to download an unknown, un-recommended add-in.
I am trying to calculate the equation of a curve which best fits some data. On the x-axis is date and y-axis the readings. The curve is quadratic, so on the chart I am fitting a 2nd order polyomial and displaying the equation. To prove that the equation the trendline gives me is reasonable, I am applying the equation on the x parameter to get the y parameter estimate and looking to see the error between predicted and actual - see attached.
The equation and the output from it are clearly rubbish, even though on the graph the trendline is a reasonable fit - see attached. Has anyone any ideas why? I think it has something to do with using a date on the x-axis but no idea why. Is there a way to correct for this? I also tried using the following I to calculate the coefficients which came up with a reasonable forecast (although linest should only be used for linear data): =LINEST(C3:C15,B3:B15^{1,2,3})
I have put my values into a XY scatter graph but need to find the maximum point i.e when the gradient is zero. I am using visual basic to obtain my data and draw my graph.
View 7 Replies View RelatedI have a data set (Set#1) that consists of a positional rank (1-240) and a dollar value ($46-$1) for each positional rank. It's not a straight line set.
DataSet.JPG
What I need to do is take that curve and apply it to another data set (Set#2) (1-240) and assign a dollar value ($46-$1) to each positional rank.
A "corner cutting" way of doing it would be an Index/Match to simply carry over the dollar value from (for example) #45 from my Set#1 to #45 in my Set#2. This could work reasonably well with data sets of the same size, but mine aren't always the same size, so I need to apply the curve itself. I
I've been working for awhile now on vector-based geometry/trig and so forth. I'm very interested now in developing a solution to the following:
Given pixel coordinates for an n-sided polygon (concave or convex) calculate the pixel area of the polygon.
My problem is, I don't have time with my reg'lar job/duties to investigate this and find the solution quicly. I was hoping perhaps some of you smarter-than-the-average bunch may already know the answer and could bring it to me a little quicker.
If no one should respond, I'll let you know when (or should I say "if") I figure it out... but unfortunately, it might be a few weeks before I can get to it.
i have a river cross section data. for different flow levels in the river i need to to calculate the flow area. i have a very large series of flow level data for 10 years at 1 hr interval.can you give a solution of that.
View 4 Replies View RelatedI have Excel 2013.
Find attached a sample fileDummy for area between.
charts.xlsx
How can I print 2 selected area (highlighted area). I know there is a trick to do that. Right now I can only select (highlight) one area to print, but would like to know how to print 2 or more areas at same time
View 7 Replies View RelatedUsing Excel 2003 I am trying to write a macro to set the print area according to the amount of data in a particular range of cells. I find I can include this instruction
View 2 Replies View RelatedI am trying to graph the following data in an area chart with line charts superimposed on the area chart. I have a lot of data (and a lot going on) so I'm trying to figure out the best way to show this in excel from a functional standpoing (i can't get this to work in excel!!) to also an asthetic standpoint (dont want it to look terrible or illegible). This is what I'm trying to chart:
1) Weather data (temperature) by region:
So one region, would be: Northwest
I would like the "area" (so a shaded region) to be the min/max of the temperature data for each month.
2) I would like to show the temperature for each year as a line graph on the chart - so you can see if a year falls in or out of the shaded region.
3) I would like to show a company's sales increases across the same months per year as separate line charts. I may choose to just show the biggest outlier year in the end... or to show 2006 (the latest data).
What I am trying to convery with the chart is that the company's sales is or is not tied to weather deviations. I have attached an excel file with the data. I haven't been able to use the area chart or get a two axis chart to work or get it to look even remotely professional.
I have a few dates and one Total value. I need to distribute this Total Value in such a way so I can get the same shape S curve (Date vs Value).
View 4 Replies View RelatedI am trying to find a formula to calculate the total size from a to b with the curve being in cluded in the total.
View 14 Replies View RelatedI'm trying Calculate Curved Price Rate by SF. phil.freestyle@gmail.com
View 5 Replies View RelatedI'd like to apply a curve to a column of student exam grades and have the curved grades displayed in the adjacent column. Here is how I'd like to curve:
I like to make a linear function out of two coordinate pairs.
First Pair (x1,y1) = (Highest Exam Grade, 99) = (H,99)
Second Pair (x2,y2) = (Class Exam Average, Desired Exam Average) =(C,D)
Slope = (99-D)/(H-C) = m
Linear Function = Y-y = m(X-x) = Y-99=m(X-H)
Each student grade would = "Y" i.e. Y=m(X-H)+99
How I can find a max in an xy chart curve fit?
View 9 Replies View RelatedDoes anyone know of a statistical formula that would create a normal growth curve?
For example. Let's assume that I want to forcast growth from January through December. I know that in January I will have 100 units. In December, I will have 1,000 units. Is there a formula to predict the the units in Feb-Nov (using a normal growth curve)?
I am working on Project Planning, I need to create the Progress curve for our Project based on Weight Factor every month.
I need to create the Plan and actual curve based on the dates defined in particular activities. Once the activity progress is calculated every month based on cut off date then it will sum product with corresponding WF to get the progress achieved every month. Presently I am calculating the values every month and pasting the values in Chart data every month. I had created the S Curve and attached here.
Now my objective is to automatically calculate the values for the entire cut off date at one time (From Project Start to End). i.e I don't want to do any manual work in the Chart. I will update only the actual Dates in the file, then the curves need to get automatically updated.
1) I don't want to calculate the progress for individual activities, I would like to calculate the overall progress directly.
2) When I change the Cut off date, then the previous values needs to become static.
I'm trying to find a formula that would spread out a value amongst multiple cells along a bell curve. Say I have $x,xxx. I want to spread that amount out in a certain proportion, regardless of how many cells I'm spreading it throughout.
Say I have a $10,000 project. I want to be able to spread it out like a bell curve in the cells I choose. For instance, if it was a five month project it would be distributed as
January - $1,000
February - $2,500
March - $3,000
April - $2,500
May - $1,000
If I added another month it would change to
January - $833.33
February - $1,666.66
March - $2,500.00
April - $2,500.00
May - $1,666.66
June - $833.33
I already thought of manually adding percentages to each cell, but the formula needs to be dynamic.
Can we draw tangent to a curve in excel graphs..? If yes if i could have some demo....** this.. I am working on finding rate ** change at an instantaneous point and average rate ** change ie: secant line
View 1 Replies View RelatedI need to solve about 450 excel sheets for my project.
The spreadsheet has X and Y data and curve is plotted. I need to split the curves into 3 parts based on slope change.
I can do it manually but I need an excel Macro which does this work.
A sample is attached : Excel forum-Lab data.xlsx
Is it possible in excel to find the equation for a curve?
I have 6 known x,y data points on a curve. I need to find the equation for the curve.
I would like to use excel to plot a growth curve. I would like it to plot the points that correlate to my data without connecting them by a line. I would then like to give excel a formula and have it plot that line on the graph.
View 9 Replies View RelatedI'm trying to graph a bell curve chart using the following data
Hotels per state
Total
AK
4
NH
5
[Code] ......
As you can see I have states and the number of hotels per state what I need not for statistical purposes but more for "pretyness" is to sort this data in a way that what you get is a somewhat of a bell shape curve graph.
I have a workbook with multiple sheets that I need to print.
Is there a way to create a fixed print area within which you can mess around with formatting without extending or shrinking the print area?
I have tried adjusting the margins settings so that they are all the same, but this does nothing to keep a fixed print area.
I want to create a bell curve for my team's annual appraisal. There are 12 people in my team. The scale is 1-5, where normally rating range from 2.9 to 4.0.
View 1 Replies View RelatedI've managed to figure out how to normalize my data and create several bell curves. However, these charts do not display the mean, std deviation, or confidence intervals. Any way to add these into my charts?
View 7 Replies View RelatedWhat would be the best way to put together a cancel curve on an annual membership model?
View 5 Replies View RelatedI would like to create a histogram from experimental data with the normal distribution curve overlaying the histogram.
View 7 Replies View RelatedIs there a way to generate a normal curve from just the statistical values (mean, std dev, etc)? I used the NORMDIST function but have to manually do the x values and it generates what I would descirbe as a "sample" curve. I would like to make one based on user input.
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