Latest Contributions by ChongyangZhu

‎07-11-2018

Thank you, Dan! This is also very helpful for my future reference! -Chongyang

‎07-11-2018

Thank you, Jenora! This is really helpful! I didn't realize there's two steps of MK test at first. -Chongyang

‎07-09-2018

Hi all, I'm trying to understand how the space time analysis tool works. However I can't find description on what the tool uses to perform Mann-Kendall Trend test. (1) As shown in the ArcGIS Pro ToolReference website, quote:"The trend analysis performed on the aggregated variables or summary field values is based on the Mann-Kendall statistic." This suggests that the tool uses the aggregated value for the variable we choose. (2) However, in another website describing How Emerging Hot Spot Works, the trends are describing as "increase or decrease in the intensity of clustering over time". I think the intensity of clustering is decided by the z-score/p-value of the spatial hot spot analysis rather than the aggregated value itself. Which one is used performing Mann-Kendall Trend test in the Space Time Analysis tool? The aggregated Value or the z-score of the of each location at each time step? Thanks in advance for the help! Chongyang

‎10-12-2017

Hi Melinda, Thank you for your help! Yes I'm using the model builder and if it's possible, I want to achieve this without python. but if not, I'll try python code. I just tried to use it as precondition of "Select Data" but the process still stuck at "Solve". It seems to me that the process is not able to go through "Solve" so that I can't use the parameter that "Solve" generates. Can you tell me what should I do to insert this python code into this model? Shall I insert the python code by "Calculate Value"? Thanks again!

‎10-12-2017

Hi everyone, I'm doing an iteration process to solve different shortest paths for different combinations of points. But the iteration stops when there is no solution for one combination. I think I may need if-else statement to check if solve fails, so I create a boolean variable "Terminate on solve error" to make it go through next step, but it still stuck at solve. I'm new to python so don't know how to achieve this function. I attach the errors and part of the model in the screenshots. Does anyone have suggestions? Thanks!

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Date Last Visited	‎09-09-2021 12:15 PM

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Latest Contributions by ChongyangZhu

Re: Space Time Analysis Algorithm Question

Re: Space Time Analysis Algorithm Question

Space Time Analysis Algorithm Question

Re: How to continue the iteration when solve routes fail?

How to continue the iteration when solve routes fail?