Dave Langer @DaveOnData

I help you unleash the power of Copilot in Excel. Check out my free crash course today 👇 bit.ly/CopilotCrashCo… Joined May 2013

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Dave Langer @DaveOnData

2 days ago

Do you want to craft data-driven forecasts using Microsoft Excel? If so, my new tutorial series is for you! Check it out on LinkedIn: linkedin.com/pulse/forecast…

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8,172 professionals will receive a new tutorial tomorrow. The topic is data-driven forecasting using Microsoft Excel. It will be the first in a new tutorial series designed for any professional looking to make more accurate forecasts using Excel. This tutorial series is…

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Dave Langer @DaveOnData

4 days ago

I've been doing analytics for 14+.years. In that time I've seen many terrible Excel financial models. Here's what these models all had in common. Too many assumptions and not enough data.

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Dave Langer @DaveOnData

5 days ago

Partnering with AI is about knowing the "why" and letting the AI generate the "how." 25,979 professionals have subscribed to my LinkedIn newsletter for weekly tutorials. Check out last week's edition demonstrating partnering with Copilot in Excel: linkedin.com/pulse/boosted-…

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Dave Langer @DaveOnData

5 days ago

Woohoo! Last batch of proofs submitted to the publisher. Hope to be able to give away a chapter sample from my book soon. Stay tuned.

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Dave Langer @DaveOnData

6 days ago

Do you use Microsoft Excel to make forecasts? FORECAST.ETS() should be your go-to. **BUT** It's a bit of a black box. Use FORECAST.ETS.STAT() to open the black box.

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Dave Langer @DaveOnData

7 days ago

Do you use Microsoft Excel to create forecasts? Check this out. FORECAST.ETS() will automatically detect seasonality in your data. FORECAST.ETS.SEASONALITY() tells you what seasonality is detected. Like chocolate and peanut butter. Better together.

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Dave Langer @DaveOnData

a week ago

Use Microsoft Excel for forecasting? Got seasonality in your business? Try FORECAST.ETS(). It finds seasonality automatically.

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Dave Langer @DaveOnData

a week ago

My newsletter tutorial this week covers AI prompts for machine learning. Specifically, using Copilot in Excel prompts to train a boosted decision tree ML model. *BUT* This is the last tutorial in the series. If you want to partner with Copilot in Excel, you need to know the…

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Dave Langer @DaveOnData

a week ago

Microsoft Excel is the world's most popular forecasting tool. With Python in Excel, millions of professionals (e.g., FP&A) got a huge upgrade: Exponential smoothing SARIMAX ARIMA And the crown jewel of forecasting - machine learning.

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Dave Langer @DaveOnData

2 weeks ago

I took accounting courses as an undergrad. While I enjoyed the courses, they never really captured my imagination. Fast forward many years and now I've become fascinated with FP&A. Why? Because I now get what my professor said all those years ago: "Accounting is the language…

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Dave Langer @DaveOnData

2 weeks ago

Good morning to the FP&A professionals out there. Here's a pro tip for better data-driven forecasts. Use Excel's FORECAST.ETS.CONFINT() function. It tells you how much a forecast might range from the low side to the high side. It's the perfect partner for FORECAST.ETS().