Leave a Review DataAnalysis
teacher
This is one of the best and most powerful apps I've seen. While some aspects are not intuitive (little about statistics is), it is very easy to use, especially with the handy tutorials that are offered at start up. It's easy enough to turn off the tutoria-at-startup feature, but I advise you to watch them first. They are short but very effective. There are features (such as automatically averaging several Y values for each X value, allowing either X or Y input for calculated values, removing background values from Y measurements, etc) that are usually found in very pricey programs.Show lessLRBB
Great app, does everything I hoped and more, and for free!
Perfect app for plotting data and getting best fit lines using different regression types. Was exactly what I was looking forJordanmac
Useful but needs work
The data I have that I've tested the app on is most appropriate for the Hill function, I think. It is the growth curve of bamboo culms. I thought I'd mention that to give some context to my mini review.
Data entry is straightforward. Fitting basic curves is also simple. Some functions, like the Hill function require some test values. That is fine, but the app really should remember previous entries. When opening a previously saved file, it is not possible to view a previously fitted curve. This issue should be easy to correct. I would also suggest defaulting the test values to previously used values, since subsequent data sets are likely to be similar to previously used data sets. That would a avoid some redundant data entry.
STANDARD curve analysis: I did not see a way to do this with the Hill function. There was no button. Maybe I just missed a step, in which case, I'd like to learn what I need to do. I suspect, though, that it's not available for some of the functions. I wonder why.
It would be nice to be able to set the x and y axis range and plot the curve extrapolating to values beyond the entered data set.
For my own application, measuring bamboo culms, identifying x=0 is difficult. At that part of the graph, the culm is nonexistent. My data can only start after growth has occurred. It would be nice if curve fitting could also normalize the x-axis somehow. It is possible to normalize the y-axis, but I'm more interested in normalizing the x-axis.
In any case, it's a nice and useful app. Exporting to Dropbox and email is a nice touch.
Edit: I've just realized the Hill function is wrong. I mentioned this to support who researched the issue and determined the correct formula is y = (Vmax * X^n)/(K + X^n). This will be corrected in the next release.Show lessVictorplmju
Good. Only thing strange
This is potential very useful, but its usefulness quickly declined for me when I found what appears to be a major flaw in logic. When you plot x,y values, x is almost always the independent variable in any function. Therefore, when I fit a function to a set of data, what I would like to do is input an x value to see what the corresponding y value is. Not the other way round.
If I know that 1 apple cost 25 cents, 2 apples cost 42 cents and 5 apples cost 96 cent and I plot this data, I would like to know how much 3 apples cost. It does not make any sense for me to have to guess a price (y value) to see how may apple I can buy (x value). Although that may sometimes be useful, the y value is what I really want to know by entering the number of apples (x value).
If you can change this, you can charge for the app, seriously.Show lessNellow3
Great app for quick and on the go plots
I just want to first say that this app is amazing. It has helped me track initial kinetics of reactions in the lab so many times that I have been too lazy to pull out my laptop.
I only have a couple suggestions. Mainly, make it available to use on iPhone. I know a lot of the functionalities would be lost, but perhaps a version that is iPhone-compatible would be well utilized (at least by me) if I want to analyze some stuff I plotted earlier on my iPad or even roughly plot while on the go.
Also, I would love to see the ability to make a double-Y plot. Being able to graph two trends on the same plot is essential for some of my reactions and would be amazing to see.
Great work so far, though! :)Show lessNucleophile
Good but useless
Can we have log log plot? No... Can we have custom function for fitting? No... Too bad this will make it useful!Carmi2
Requests
Data tables, landscape, title in the graph, gridlines, Open In for PDF, and save graph along with fit aka trend line and its equation and data tables as PDF :)Epal & Oren
really good!
REALLY useful and easy to work with it, I use a lot!Gabriel Soldi
Crashes on iPad 2
It's great when it worked, now it crashes on my iPad whenever I try to launch it.truedichotomy
review/request
I think this app will be useful to me, thank you. However, I have difficulty using any app in portrait mode on the iPad.
Please, for next update, have app respect landscape mode when iPad is oriented landscape.mmcx
