Видео

You help support why the result does not give time. Shows as follows: "Calculating the Standardized Precipitation Evapotranspiration Index (SPEI) at a time scale of 12. Using kernel type 'rectangular', with 0 shift. Fitting the data to a Gamma distribution. Using the ub-pwm parameter fitting method. Checking for missing values (`NA`): all the data must be complete. Using the whole time series as reference period. Input type is vector. No time information provided, assuming a monthly time series." > spi12 [1] NA NA NA NA NA [6] NA NA NA NA NA [11] NA 0.679419713 0.737471227 0.790080515 0.820811309 [16] 2.151086775 2.617255597 2.601911891 2.713825284 2.580371812 [21] 2.112327737 2.299911356 2.586113548 2.500258158 2.492536422 [26] 2.486388028 2.411616411 1.185866790 0.804289128 0.693374171 [31] 0.464977809 0.830409527 1.038184230 1.435877766 1.058104392 [36] 0.966976130 0.990998566 0.944076140 1.292605661 1.131318906 [41] 1.071361749 0.690525465 0.853161502 0.567990488 0.573854006 [46] 0.461109623 0.799253198 0.535747285 0.554176515 0.542788477 [51] 0.068151216 -0.337533811 0.119636757 0.621338448 0.150366550 [56] 0.322739165 0.300756025 0.053814520 -0.115833400 -0.203898165 [61] -0.183484997 -0.188825041 -0.179531793 -0.078564280 -0.233651678 [66] -0.664597034 0.192203095 -0.126378666 -0.031111415 0.835066145 [71] 0.735421379 0.697692292 0.779056701 0.775376649 0.755048826 [76] 0.583611313 0.201982101 0.324530270 -0.258968371 -0.092210727 [81] -0.251935527 -1.515868680 -1.746073420 -1.513736936 -1.573115047 [86] -1.580448334 -1.522504792 -1.338583547 -1.070523284 -0.995997851 [91] -0.491548425 -0.657980534 -0.227801263 0.180396652 0.554959527 [96] 0.716507005 0.751931852 0.747635304 0.727598675 0.937048949 [101] 0.502432269 0.932027898 0.454455982 0.935684554 0.664951255 [106] 0.026322064 -0.430398404 -0.673413529 -0.440462080 -0.446169511 [111] -0.406534549 -0.657204143 -0.025526101 -0.418174339 -0.861474789 [116] -0.960207058 -0.935194519 0.108229813 0.287380043 0.128227037 [121] -0.063666666 -0.062499251 -0.071526850 0.097228501 0.425786493 [126] 0.335358024 0.521517094 0.428490674 0.526151225 0.470490752 [131] 1.035763214 1.070827217 1.094362066 1.152574295 1.130593631 [136] 1.059149739 0.630912901 0.857208010 1.004492885 0.637055860 [141] 0.791152176 0.173947159 -0.619322774 -0.638250557 -0.390351394 [146] -0.476022951 -0.481775471 -0.667395131 -1.185211921 -1.319665492 [151] -1.719223820 -1.070457295 -1.577501245 -0.722687416 0.658321690 [156] 0.824597002 0.648474106 0.644319873 0.662559881 0.712581798 [161] 1.372447701 1.648275453 1.745480424 2.049818983 2.135119030 [166] 1.300174852 0.349539886 0.081810229 0.109931166 0.110290667 [171] 0.478688119 0.608760017 0.330750826 -0.035609102 -0.027634570 [176] -0.986348530 -0.091009616 0.191672504 -0.103542198 -0.124119629 [181] -0.063983152 -0.052370650 -0.465962812 -0.169130547 -0.648317721 [186] -0.719891158 -0.620713553 -0.338155901 -0.934205135 -1.205987691 [191] -1.102345757 -1.090694790 -1.128708762 -1.160630772 -1.135490934 [196] -1.535480573 -1.101530885 -1.051912121 -1.003979138 -0.984988377 [201] -0.967585575 -0.782402014 -0.429365729 -0.122531523 -0.093784281 [206] -0.098996210 -0.092462560 0.032256940 -0.338848714 -0.135733216 [211] -0.863105287 -0.778286656 -0.698146452 -0.827368273 -1.346459763 [216] -1.626943845 -1.618085533 -1.623952716 -1.570572309 -1.666212690 [221] -1.264592293 -1.264634751 -0.802682167 -0.972078715 -1.444901619 [226] -1.295809083 -0.706265175 -0.499717835 -0.366061750 -0.265319264 [231] -0.241429842 -0.201157933 -0.352576259 -0.397947997 -0.088032525 [236] 0.147886684 0.602783932 0.921637655 0.965469287 1.117757590 [241] 1.061990361 0.966152534 0.929271082 0.836074904 0.541398281 [246] 0.391160895 0.179616951 0.164736426 0.057772835 -0.704887993 [251] -1.242970017 -1.101752602 -0.994718827 -1.000866568 -0.965598065 [256] -0.830911984 -0.493921789 -0.311111108 -0.882044411 -0.806156445 [261] -0.961956783 -1.132794122 -0.883521047 -1.431844535 -1.529535683 [266] -1.537941619 -1.488304108 -1.277469106 -2.107978894 -1.609561253 [271] -1.541012099 -1.631989956 -1.111713741 -0.335415816 -0.338273794 [276] -0.280538270 -0.236915673 -0.236514045 -0.225755764 0.079884108 [281] 0.392638369 -0.258427662 0.007514732 -0.063641490 -0.323863912 [286] -1.193932927 -0.922761784 -0.943044140 -0.948198423 -0.914611156 [291] -0.805661850 -0.948176369 -0.794517129 -0.489694829 0.091843972 [296] 0.212737808 0.180442940 0.648837103 0.336571119 0.451897291 [301] 0.496413065 0.569088726 0.490508846 0.443728403 0.674920860 [306] 0.689230275 0.851044889 0.668600450 0.693575491 0.731306303 [311] 0.711413112 0.580759602

Your soundtrack is pathetic. and without the proper soundtrack the vidio is not of much use.

Hello .I really find it good but I just need a help how u have used 28.78° as latitude bcoz its always in any range I want to know it plz help. I would like to hear back

😊

How to configurate colors for plot ? Positive and negative have same colors in R studio plots

bro that package has an error computing etp by hargreave's method cuz if u try it using just an spreadsheet in excel the results will be different and will not have anything related with the results obtained in R by the SPEI package.

Hello, thnak you for this vidéo and explication may i ask you question about how to organise my data in excel to convert my data from daily to mounthly and thank you wish you good Luck

[1] "Calculating the Standardized Precipitation Evapotranspiration Index (SPEI) at a time scale of 6. Using kernel type 'rectangular', with 0 shift. Fitting the data to a Gamma distribution. Using the ub-pwm parameter fitting method. Checking for missing values (`NA`): all the data must be complete. Using the whole time series as reference period. Input type is vector. No time information provided, assuming a monthly time series." Sir how can i encounter these problems ?

hello sir. you excel data is not same as in video

Thanks for your video. May I ask one question？ For calculating the SPI, I choose the Gamma distribution which is also default for SPI. And I used the maximum likelihood as the estimated method to calculate the parameters of the fitted Gamma distribution. But all the output are NA. I also change it to plotting position, values still NA. If I choose the default one “un-pmw” as same as the video, I could get right output values. I don’t know why the method maximum likelihood can’t work.

How to get the column names as 'Jan' 'feb'? my data is arranged exactly like the shown excel yet it doesn't show the column names

thank you, how to change the spei class to dbl? I am looking for a method to add the column to the database in R itself , by mutating

Thanks for the video, it mad the work easier but I encountered this issue, [could not find function "plot.spei"] Is there any solution to it? Thanks in advance

Thanks for your video, it helped me a lot. Unfortunately, I still have a problem computing the SPI values: I set up my data exactly as you did (year, month, prcp), but when running the SPI call it does not return the "Jan", "Feb"...etc. headings. plot.spei also does not seem to exist. Do you have any idea what I am doing wrong? Thanks so much for your help!

How do I test for best fit using AIC BIC Wilks AD test for different distribution parameter I.e gamma gumbel etc for different time scale for multiple stations ?

How about multiple stations

can you make excel file and video for SPEI too?

help please, not getting the template from the download.

What does 1978 mean in "HLOOKUP($B4,$N$2:$Z$40,ABS(1978-A4),0)" code? Can you explain this formula? I have data set of 1901 to 2021 so I want to adjust it accordingly. Thanks very much.

Hey just a small question? what is 1978 in "=HLOOKUP($B3,$N$2:$Z$40,ABS(1978-A3),0)"? Can you explain this function? many thanks.

In throntwait method you are choosing latitude why? Actually drought is regional phenomena so we take lat entire region not particular point??

You are doing it for one latitude what if I want to do it for multiple latitude and longitude

thank you so much, your video was very useful for me🙏

Please if it is possible for make it in English

HI! ..... the excel link appears blank can you send it again please :(?

Hey the linked excel file is blank? Could you upload again? Thanks again for the vid - so helpful!

Thank you so much for this video...

How to calculate for 4 months

Hello, The Excel file you put in the link is incorrect. Can you throw it again?

Hi How is evapotranspiration calculated according to the number of plants per decare?

How do I calculate PET for varying latitude ? looping through latitude did not work.

complete nonsense

Hi. thank you for this well explained tutorial . I faced with a problem using penman function . I have all the data in the code that I send here.my code is : penman(data$Tmin,data$Tmax,data$U2,lat = 36.26,data$tsun,data$RH,z = 1213,crop = 'short') but when I run it this error appears : Error in penman ( data $Tmin , data $Tmax, data$U2, la t = 36.26, data $tsun , : object 'm le n' not found In addition: Warning message: In penman(data $Tmin , data $Tmax, data$U2, la t = 36.26, data $tsun , : Using user-provided (Ra) can you tell me which part did I wrong and what is the meaning of this error. thanks

The file you attached is different from the one you are using here. The one you attached has Raw data sheet, sheet1, 701, spi3, spi6 and spi12. You don't have any formula in 701 for the one you have attached. Also, you copied the first 6 months and pasted and i wonder how you get the remaining 6 months (july to december). Please can you explain all these and also send me the correct excel sheet with all the formulas? Thanks

Thanks for your valuable video. Could you please let me how to create your Raw data sheet excel file with auto arranging spi3 ,spi6, etc please? please send me a link how to create like this excel sheet if it is available

how to interpret these chart plz expalin

Hi I have some missing rainfall value so how can I solve the problem

HELLO plz what's the solution for missing data

hi do you have a video regarding spi duration intensity frequency calculation?

How I can export result of SPEI into excel or csv file? I tried but I found error "Error in as.data.frame.default(x[[i]], optional = TRUE, stringsAsFactors = stringsAsFactors) : cannot coerce class ‘"spei"’ to a data.frame"

please how can I modify the horizontal axis value, to use dates instead of numbers?

Plz plz 🙏🙏...becoz hv project submission tomorrow

Plz provide me excel file for period 2021 to 2058

Plz provide sheet for period 2021 to 1958

Owo..Research

Thank you for this helpful video. I have 2 questions. What is the difference between Penman and Penman Monteith method for calculating potantial evapotranspiration? And can we calculate pot. evapotranspiration in R Studio using P. Monteith Method?

Thank you for the video. How do I determine the drought year from obtained data? Do I take SPI-12 value of December?

Hi thank you so much for the video , it helped me so much but i just wonder that how can i see the process of calculation for different periods. I mean i want to know how and which calculation R does? Can you help me about that?

Could you please clarify what data should we take for SPI Monthly (Sum) or Monthly (Average) RF ???

hello in my data lots of zeros thats why my index values are not correct. what could i do for that?